Search Results: "zed"

26 May 2020

Russ Allbery: Review: The Ten Thousand Doors of January

Review: The Ten Thousand Doors of January, by Alix E. Harrow
Publisher: Redhook
Copyright: September 2019
ISBN: 0-316-42198-7
Format: Kindle
Pages: 373
In 1901, at the age of seven, January found a Door. It was barely more than a frame in a ruined house in a field in Kentucky, but she wrote a story about opening it, and then did.
Once there was a brave and temeraryous (sp?) girl who found a Door. It was a magic Door that's why it has a capital D. She opened the Door.
The Door led to a bluff over the sea and above a city, a place very far from Kentucky, and she almost stayed, but she came back through the Door when her guardian, Mr. Locke, called. The adventure cost her a diary, several lectures, days of being locked in her room, and the remnants of her strained relationship with her father. When she went back, the frame of the Door was burned to the ground. That was the end of Doors for January for some time, and the continuation of a difficult childhood. She was cared for by her father's employer as a sort of exotic pet, dutifully attempting to obey, grateful for Mr. Locke's protection, and convinced that he was occasionally sneaking her presents through a box in the Pharaoh Room out of some hidden kindness. Her father appeared rarely, said little, and refused to take her with him. Three things helped: the grocery boy who smuggled her stories, an intimidating black woman sent by her father to replace her nurse, and her dog.
Once upon a time there was a good girl who met a bad dog, and they became the very best of friends. She and her dog were inseparable from that day forward.
I will give you a minor spoiler that I would have preferred to have had, since it would have saved me some unwarranted worry and some mental yelling at the author: The above story strains but holds. January's adventure truly starts the day before her seventeenth birthday, when she finds a book titled The Ten Thousand Doors in the box in the Pharaoh Room. As you may have guessed from the title, The Ten Thousand Doors of January is a portal fantasy, but it's the sort of portal fantasy that is more concerned with the portal itself than the world on the other side of it. (Hello to all of you out there who, like me, have vivid memories of the Wood between the Worlds.) It's a book about traveling and restlessness and the possibility of escape, about the ability to return home again, and about the sort of people who want to close those doors because the possibility of change created by people moving around freely threatens the world they have carefully constructed. Structurally, the central part of the book is told by interleaving chapters of January's tale with chapters from The Ten Thousand Doors. That book within a book starts with the framing of a scholarly treatment but quickly becomes a biography of a woman: Adelaide Lee Larson, a half-wild farm girl who met her true love at the threshold of a Door and then spent much of her life looking for him. I am not a very observant reader for plot details, particularly for books that I'm enjoying. I read books primarily for the emotional beats and the story structure, and often miss rather obvious story clues. (I'm hopeless at guessing the outcomes of mysteries.) Therefore, when I say that there are many things January is unaware of that are obvious to the reader, that's saying a lot. Even more clues were apparent when I skimmed the first chapter again, and a more observant reader would probably have seen them on the first read. Right down to Mr. Locke's name, Harrow is not very subtle about the moral shape of this world. That can make the early chapters of the book frustrating. January is being emotionally (and later physically) abused by the people who have power in her life, but she's very deeply trapped by false loyalty and lack of external context. Winning free of that is much of the story of the book, and at times it has the unpleasantness of watching someone make excuses for her abuser. At other times it has the unpleasantness of watching someone be abused. But this is the place where I thought the nested story structure worked marvelously. January escapes into the story of The Ten Thousand Doors at the worst moments of her life, and the reader escapes with her. Harrow uses the desire to switch scenes back to the more adventurous and positive story to construct and reinforce the emotional structure of the book. For me, it worked extremely well. It helps that the ending is glorious. The payoff is worth all the discomfort and tension-building in the first half of the book. Both The Ten Thousand Doors and the surrounding narrative reach deeply satisfying conclusions, ones that are entangled but separate in just the ways that they need to be. January's abilities, actions, and decisions at the end of the book were just the outcome that I needed but didn't entirely guess in advance. I could barely put down the last quarter of this story and loved every moment of the conclusion. This is the sort of book that can be hard to describe in a review because its merits don't rest on an original twist or easily-summarized idea. The elements here are all elements found in other books: portal fantasy, the importance of story-telling, coming of age, found family, irrepressible and indomitable characters, and the battle of the primal freedom of travel and discovery and belief against the structural forces that keep rulers in place. The merits of this book are in the small details: the way that January's stories are sparse and rare and sometimes breathtaking, the handling of tattoos, the construction of other worlds with a few deft strokes, and the way Harrow embraces the emotional divergence between January's life and Adelaide's to help the reader synchronize the emotional structure of their reading experience with January's.
She writes a door of blood and silver. The door opens just for her.
The Ten Thousand Doors of January is up against a very strong slate for both the Nebula and the Hugo this year, and I suspect it may be edged out by other books, although I wouldn't be unhappy if it won. (It probably has a better shot at the Nebula than the Hugo.) But I will be stunned if Harrow doesn't walk away with the Mythopoeic Award. This seems like exactly the type of book that award was created for. This is an excellent book, one of the best I've read so far this year. Highly recommended. Rating: 9 out of 10

Norbert Preining: Multi-device and RAID1 with btrfs

I have been using btrfs, a modern modern copy on write filesystem for Linux, since many years now. But only recently I realized how amateurish my usage has been. Over the last day I switched to multiple devices and threw in a RAID1 level at the same time.
For the last years, I have been using btrfs in a completely naive way, simply creating new filesystems, mounting them, moving data over, linking the directories into my home dir, etc etc. It all became a huge mess over time. I have heard of multi-device support , but always thought that this is for the big players in the data centers not realizing that it works trivially on your home system, too. Thanks to an article by Mark McBride I learned how to better use it! Btrfs has an impressive list of features, and is often compared to (Open)ZFS (btw, they domain openzfs.org has a botched SSL certificate .. umpf, my trust disappears even more) due to the high level of data security. I have been playing around with the idea to use ZFS for quite some time, but first of all it requires compiling extra modules all the time, because ZFS cannot be included in the kernel source. And much more, I realized that ZFS is simply too inflexible with respect to disks of different sizes in a storage pool. Btrfs on the other hand allows adding and removing devices to the filesystem on a running system. I just added a 2TB disk to my rig, and called:
btrfs device add /dev/sdh1 /
and with that alone, my root filesystem grew immediately. At the end I have consolidated data from 4 extra SSDs into this new filesystem spanning multiple disks, and got rid of all the links and loops. For good measure, and since I had enough space left, I also switched to RAID1 for this filesystem. This again, surprisingly, works on a running system!
btrfs balance start -dconvert=raid1 -mconvert=raid1 /
Here, both data and metadata are mirrored on the devices. With 6TB of total disk space, the balancing operation took quite some time, about 6h in my case, but finished without a hiccup. After all that, the filesystem now looks like this:
$ sudo btrfs fi show /
Label: none  uuid: XXXXXX
	Total devices 5 FS bytes used 2.19TiB
	devid    1 size 899.01GiB used 490.03GiB path /dev/sdb3
	devid    2 size 489.05GiB used 207.00GiB path /dev/sdd1
	devid    3 size 1.82TiB used 1.54TiB path /dev/sde1
	devid    4 size 931.51GiB used 649.00GiB path /dev/sdf1
	devid    5 size 1.82TiB used 1.54TiB path /dev/sdc1
and using btrfs fi usage / I can get detailed information about the device usage and status. Stumbling blocks You wouldn t expect such a deep rebuilding of the intestines of a system to go without a few bumps, and indeed, there are a few: First of all, update-grub is broken when device names are used. If you have GRUB_DISABLE_LINUX_UUID=true, so that actual device nodes are used in grub.cfg, the generated entries are broken because they list all the devices. This comes from the fact that grub-mkconfig uses grub-probe --target=device / to determine the root device, and this returns in our case:
# grub-probe --target=device /
/dev/sdb3
/dev/sdd1
/dev/sde1
/dev/sdf1
/dev/sdc1
and thus the grub config file contains entries like:
...
menuentry 'Debian GNU/Linux ...' ...  
  ...
  linux	/boot/vmlinuz-5.7.0-rc7 root=/dev/sdb3
/dev/sdd1
/dev/sde1
/dev/sdf1
/dev/sdc1 ro <other options>
 
This is of course an invalid entry, but fortunately grub still boots, but ignores the rest of the command line options. So I decided to turn back to using UUID for the root entry, which should be better supported. But alas, what happened, I couldn t even boot anymore. Grub gave me very cryptic messages like cannot find UUID device and dropping you into the grub rescue shell, then having the grub rescue shell being unable to read any filesystem at all (not even FAT or ext2!). The most cryptic one was grub header bytenr is not equal node addr, where even Google gave up on it. At the end I booted into a rescue image (you always have something like SystemRescueCD on an USB stick next to you during these operations, right?), mounted the filesystem manually, and reinstalled grub, which fixed the problem, and now the grub config file contains only the UUID for root. I don t blame btrfs for that, this is more like we are, after sooo many years, we still don t have a good boot system  All in all, a very smooth transition, and at least for some time I don t have to worry about which partition has still some space left. Thanks btrfs and Open Source!

20 May 2020

Norbert Preining: Plasma 5.19 coming to Debian

The KDE Plasma desktop is soon getting an update to 5.19, and beta versions are out for testing.
In this release, we have prioritized making Plasma more consistent, correcting and unifying designs of widgets and desktop elements; worked on giving you more control over your desktop by adding configuration options to the System Settings; and improved usability, making Plasma and its components easier to use and an overall more pleasurable experience.
There are lots of new features mentioned in the release announcement, I like in particular the much more usable settings application as well as the new info center.



I have been providing builds of KDE related packages since quite some time now, see everything posted under the KDE tag. In the last days I have prepared Debian packages for Plasma 5.18.90 on OBS, for now only targeting Debian/sid and amd64 architecture. These packages require Qt 5.14, which is only available in the experimental suite, and there is no way to simply update to Qt 5.14 since all Qt related packages need to be recompiled. So as long as Qt 5.14 doesn t hit unstable, I cannot really run these packages on my main machine, but I tried a clean Debian virtual machine installing only Plasma 5.18.90 and depending packages, plus some more for a pleasant desktop experience. This worked out quite well, the VM runs Plasma 5.18.90. I don t have 3D running on the VM, so I cannot really check all the nice new effects, but I am sure on my main system they would work. Well, bottom line, as soon as we have Qt 5.14 in Debian/unstable, we are also ready for Plasma 5.19!

18 May 2020

Arturo Borrero Gonz lez: A better Toolforge: upgrading the Kubernetes cluster

Logos This post was originally published in the Wikimedia Tech blog, and is authored by Arturo Borrero Gonzalez and Brooke Storm. One of the most successful and important products provided by the Wikimedia Cloud Services team at the Wikimedia Foundation is Toolforge. Toolforge is a platform that allows users and developers to run and use a variety of applications that help the Wikimedia movement and mission from the technical point of view in general. Toolforge is a hosting service commonly known in the industry as a Platform as a Service (PaaS). Toolforge is powered by two different backend engines, Kubernetes and GridEngine. This article focuses on how we made a better Toolforge by integrating a newer version of Kubernetes and, along with it, some more modern workflows. The starting point in this story is 2018. Yes, two years ago! We identified that we could do better with our Kubernetes deployment in Toolforge. We were using a very old version, v1.4. Using an old version of any software has more or less the same consequences everywhere: you lack security improvements and some modern key features. Once it was clear that we wanted to upgrade our Kubernetes cluster, both the engineering work and the endless chain of challenges started. It turns out that Kubernetes is a complex and modern technology, which adds some extra abstraction layers to add flexibility and some intelligence to a very old systems engineering need: hosting and running a variety of applications. Our first challenge was to understand what our use case for a modern Kubernetes was. We were particularly interested in some key features: Soon enough we faced another Kubernetes native challenge: the documentation. For a newcomer, learning and understanding how to adapt Kubernetes to a given use case can be really challenging. We identified some baffling patterns in the docs. For example, different documentation pages would assume you were using different Kubernetes deployments (Minikube vs kubeadm vs a hosted service). We are running Kubernetes like you would on bare-metal (well, in CloudVPS virtual machines), and some documents directly referred to ours as a corner case. During late 2018 and early 2019, we started brainstorming and prototyping. We wanted our cluster to be reproducible and easily rebuildable, and in the Technology Department at the Wikimedia Foundation, we rely on Puppet for that. One of the first things to decide was how to deploy and build the cluster while integrating with Puppet. This is not as simple as it seems because Kubernetes itself is a collection of reconciliation loops, just like Puppet is. So we had to decide what to put directly in Kubernetes and what to control and make visible through Puppet. We decided to stick with kubeadm as the deployment method, as it seems to be the more upstream-standardized tool for the task. We had to make some interesting decisions by trial and error, like where to run the required etcd servers, what the kubeadm init file would look like, how to proxy and load-balance the API on our bare-metal deployment, what network overlay to choose, etc. If you take a look at our public notes, you can get a glimpse of the number of decisions we had to make. Our Kubernetes wasn t going to be a generic cluster, we needed a Toolforge Kubernetes service. This means we don t use some of the components, and also, we add some additional pieces and configurations to it. By the second half of 2019, we were working full-speed on the new Kubernetes cluster. We already had an idea of what we wanted and how to do it. There were a couple of important topics for discussions, for example: We will describe in detail the final state of those pieces in another blog post, but each of the topics required several hours of engineering time, research, tests, and meetings before reaching a point in which we were comfortable with moving forward. By the end of 2019 and early 2020, we felt like all the pieces were in place, and we started thinking about how to migrate the users, the workloads, from the old cluster to the new one. This migration plan mostly materialized in a Wikitech page which contains concrete information for our users and the community. The interaction with the community was a key success element. Thanks to our vibrant and involved users, we had several early adopters and beta testers that helped us identify early flaws in our designs. The feedback they provided was very valuable for us. Some folks helped solve technical problems, helped with the migration plan or even helped make some design decisions. Worth noting that some of the changes that were presented to our users were not easy to handle for them, like new quotas and usage limits. Introducing new workflows and deprecating old ones is always a risky operation. Even though the migration procedure from the old cluster to the new one was fairly simple, there were some rough edges. We helped our users navigate them. A common issue was a webservice not being able to run in the new cluster due to stricter quota limiting the resources for the tool. Another example is the new Ingress layer failing to properly work with some webservices s particular options. By March 2020, we no longer had anything running in the old Kubernetes cluster, and the migration was completed. We then started thinking about another step towards making a better Toolforge, which is introducing the toolforge.org domain. There is plenty of information about the change to this new domain in Wikitech News. The community wanted a better Toolforge, and so do we, and after almost 2 years of work, we have it! All the work that was done represents the commitment of the Wikimedia Foundation to support the technical community and how we really want to pursue technical engagement in general in the Wikimedia movement. In a follow-up post we will present and discuss more in-depth about some technical details of the new Kubernetes cluster, stay tuned! This post was originally published in the Wikimedia Tech blog, and is authored by Arturo Borrero Gonzalez and Brooke Storm.

17 May 2020

Erich Schubert: Contact Tracing Apps are Useless

Some people believe that automatic contact tracing apps will help contain the Coronavirus epidemic. They won t. Sorry to bring the bad news, but IT and mobile phones and artificial intelligence will not solve every problem. In my opinion, those that promise to solve these things with artificial intelligence / mobile phones / apps / your-favorite-buzzword are at least overly optimistic and blinder Aktionismus (*), if not naive, detachted from reality, or fraudsters that just want to get some funding. (*) there does not seem to be an English word for this doing something just for the sake of doing something, without thinking about whether it makes sense to do so Here are the reasons why it will not work:
  1. Signal quality. Forget detecting proximity with Bluetooth Low Energy. Yes, there are attempts to use BLE beacons for indoor positioning. But these use that you can learn fingerprints of which beacons are visible at which points, combined with additional information such as movement sensors and history (you do not teleport around in a building). BLE signals and antennas apparently tend to be very prone to orientation differences, signal reflections, and of course you will not have the idealized controlled environment used in such prototypes. The contacts have a single device, and they move this is not comparable to indoor positioning. I strongly doubt you can tell whether you are close to someone, or not.
  2. Close vs. protection. The app cannot detect protection in place. Being close to someone behind a plexiglass window or even a solid wall is very different from being close otherwise. You will get a lot of false contacts this way. That neighbor that you have never seen living in the appartment above will likely be considered a close contact of yours, as you sleep next to each other every day
  3. Low adoption rates. Apparently even in technology affine Singapore, fewer than 20% of people installed the app. That does not even mean they use it regularly. In Austria, the number is apparently below 5%, and people complain that it does not detect contact But in order for this approach to work, you will need Chinese-style mass surveillance that literally puts you in prison if you do not install the app.
  4. False alerts. Because of these issues, you will get false alerts, until you just do not care anymore.
  5. False sense of security. Honestly: the app does not pretect you at all. All it tries to do is to make the tracing of contacts easier. It will not tell you reliably if you have been infected (as mentioned above, too many false positives, too few users) nor that you are relatively safe (too few contacts included, too slow testing and reporting). It will all be on the quality of about 10 days ago you may or may not have contact with someone that tested positive, please contact someone to expose more data to tell you that it is actually another false alert .
  6. Trust. In Germany, the app will be operated by T-Systems and SAP. Not exactly two companies that have a lot of fans SAP seems to be one of the most hated software around. Neither company is known for caring about privacy much, but they are prototypical for business first . Its trust the cat to keep the cream. Yes, I know they want to make it open-source. But likely only the client, and you will still have to trust that the binary in the app stores is actually built from this source code, and not from a modified copy. As long as the name T-Systems and SAP are associated to the app, people will not trust it. Plus, we all know that the app will be bad, given the reputation of these companies at making horrible software systems
  7. Too late. SAP and T-Systems want to have the app ready in mid June. Seriously, this must be a joke? It will be very buggy in the beginning (because it is SAP!) and it will not be working reliably before end of July. There will not be a substantial user before fall. But given the low infection rates in Germany, nobody will bother to install it anymore, because the perceived benefit is 0 one the infection rates are low.
  8. Infighting. You may remember that there was the discussion before that there should be a pan-european effort. Except that in the end, everybody fought everybody else, countries went into different directions and they all broke up. France wanted a centralized systems, while in Germany people pointed out that the users will not accept this and only a distributed system will have a chance. That failed effort was known as Pan-European Privacy-Preserving Proximity Tracing (PEPP-PT) vs. Decentralized Privacy-Preserving Proximity Tracing (DP-3T) , and it turned out to have become a big clusterfuck . And that is just the tip of the iceberg.
Iceleand, probably the country that handled the Corona crisis best (they issued a travel advisory against Austria, when they were still happily spreading the virus at apres-ski; they massively tested, and got the infections down to almost zero within 6 weeks), has been experimenting with such an app. Iceland as a fairly close community managed to have almost 40% of people install their app. So did it help? No: The technology is more or less I wouldn t say useless [ ] it wasn t a game changer for us. The contact tracing app is just a huge waste of effort and public money. And pretty much the same applies to any other attempts to solve this with IT. There is a lot of buzz about solving the Corona crisis with artificial intelligence: bullshit! That is just naive. Do not speculate about magic power of AI. Get the data, understand the data, and you will see it does not help. Because its real data. Its dirty. Its late. Its contradicting. Its incomplete. It is all what AI currently can not handle well. This is not image recognition. You have no labels. Many of the attempts in this direction already fail at the trivial 7-day seasonality you observe in the data For example, the widely known John Hopkins Has the curve flattened trend has a stupid, useless indicator based on 5 day averages. And hence you get the weekly up and downs due to weekends. They show pretty up and down indicators. But these are affected mostly by the day of the week. And nobody cares. Notice that they currently even have big negative infections in their plots? There is no data on when someone was infected. Because such data simply does not exist. What you have is data when someone tested positive (mostly), when someone reported symptons (sometimes, but some never have symptoms!), and when someone dies (but then you do not know if it was because of Corona, because of other issues that became just worse because of Corona, or hit by a car without any relation to Corona). The data that we work with is incredibly delayed, yet we pretend it is live . Stop reading tea leaves. Stop pretending AI can save the world from Corona.

16 May 2020

Norbert Preining: Upgrading AMD Radeon 5700 to 5700 XT via BIOS

Having recently switched from NVIDIA to AMD graphic cards, in particular a RX 5700, I found out that I can get myself a free upgrade to the RX 5700 XT variant without paying one Yen, by simply flashing a compatible 5700 XT BIOS onto the 5700 card. Not that this is something new, a detailed explanation can be found here.
The same article also gives a detailed technical explanation on the difference between the two cards. The 5700 variant has less stream processors (2304 against 2560 in the XT variant), and lower power limits and clock speeds. Other than this they are based on the exact same chip layout (Navi 10), and with the same amount and type of memory 8 GB GDDR6. Flashing the XT BIOS onto the plain 5700 will not changes the number of stream processors, but power limits and clock speeds are raised to the same level of the 5700 XT, providing approximately a 7% gain without any over-clocking and over-powering, and potentially more by raising voltage etc. Detailed numbers can be found in the linked article above. The first step in this free upgrade is to identify ones own card correctly, best with device id and subsystem id, and then find the correct BIOS. Lots of BIOS dumps are provided in the BIOS database (link already restricting to 5700 XT BIOS). I used CPU-Z (Windows program) to determine this items, see image on the right (click to enlarge). In my case I got 1002 731F - 1462 3811 for the complete device id. The card is a MSI RX 5700 8 GB Mech OC, so I found the following alternative BIOS for MSI RX 5700 XT 8 GB Mech OC. Unfortunately, it seems that MSI is distinguishing 5700 and 5700 XT by their device id, because the XT variant gives 1002 731F - 1462 3810 for the complete device id, meaning that the last digit is 1 off compared to mine (3811 versus 3810). And indeed, trying to flash this video BIOS the normal way (using the Windows version ended in a warning that the subsystem id is different. A bit of search led to a thread in the TechPowerup Fora and this post explaining how to force the flashing in this case. Disclaimer: The following might brick your graphic card, you are doing this on your own risk! Necessary software: I did all the flashing and checking under Windows, but only because I realized too late that there is a fully uptodate flashing program for Linux that exhibits the same functionality. Also, I didn t know how to get the device id since the current AMD ROCm tools seem not to provide this data. If you are lucky and the device ids for your card are the same for both 5700 and 5700 XT variants, then you can use the graphical client (amdvbflashWin.exe), but if there is a difference, the command line is necessary. After unpacking the AMD Flash program and getting the correct BIOS rom file, the steps taken on Windows are (the very same steps can be taken on Linux): This should succeed in both cases. After that shutdown and restart your computer and you should be greeted with a RT 5700 XT card, without twisting a single screw. Starting Windows for the first time gave some flickering, because the driver for the new card was installed. On Linux the system auto-detects the card and everything works out of the box. Very smooth. Finally, a word of warning: Don t do these kind of things if you are not ready to pay the prize of a bricked GPU card in case something goes wrong! Everything is on your own risk! Let me close with a before/after image, most of the fields are identical, but the default/gpu clocks both at normal as well as boost levels see a considerable improvement

15 May 2020

Junichi Uekawa: Bought Canon TS3300 Printer.

Bought Canon TS3300 Printer. I haven't bought a printer in 20 years. 5 years ago I think I would have used Google Cloud Print which took forever uploading and downloading huge print data to the cloud. 20 years ago I would have used LPR and LPD, admiring the postscript backtraces. Configuration was done using Android app, the printer could be connected via WiFi and then configuration through the app allowed printer to be connected to the home WiFi network, feels modern. It was recognized as a IPPS device by Chrome OS (using CUPS?). No print server necessary. Amazing.

12 May 2020

Petter Reinholdtsen: Debian Edu interview: Yvan Masson

It has been way too long since my last interview, but as the Debian Edu / Skolelinux community is still active, and new people keep showing up on the IRC channel #debian-edu and the debian-edu mailing list, I decided to give it another go. I was hoping someone else might pick up the idea and run with it, but this has not happened as far as I can tell, so here we are This time the announcement of a new free software tool to create a school year book triggered my interest, and I decided to learn more about its author. Who are you, and how do you spend your days? My name is Yvan MASSON, I live in France. I have my own one person business in computer services. The work consist of visiting my customers (person's home, local authority, small business) to give advise, install computers and software, fix issues, and provide computing usage training. I spend the rest of my time enjoying my family and promoting free software. What is your approach for promoting free software? When I think that free software could be suitable for someone, I explain what it is, with simple words, give a few known examples, and explain that while there is no fee it is a viable alternative in many situations. Most people are receptive when you explain how it is better (I simplify arguments here, I know that it is not so simple): Linux works on older hardware, there are no viruses, and the software can be audited to ensure user is not spied upon. I think the most important is to keep a clear but moderated speech: when you try to convince too much, people feel attacked and stop listening. How did you get in contact with the Skolelinux / Debian Edu project? I can not remember how I first heard of Skolelinux / Debian Edu, but probably on planet.debian.org. As I have been working for a school, I have interest in this type of project. The school I am involved in is a school for "children" between 14 and 18 years old. The French government has recommended free software since 2012, but they do not always use free software themselves. The school computers are still using the Windows operating system, but all of them have the classic set of free software: Firefox ESR, LibreOffice (with the excellent extension Grammalecte that indicates French grammatical errors), SumatraPDF, Audacity, 7zip, KeePass2, VLC, GIMP, Inkscape What do you see as the advantages of Skolelinux / Debian Edu? It is free software! Built on Debian, I am sure that users are not spied upon, and that it can run on low end hardware. This last point is very important, because we really need to improve "green IT". I do not know enough about Skolelinux / Debian Edu to tell how it is better than another free software solution, but what I like is the "all in one" solution: everything has been thought of and prepared to ease installation and usage. I like Free Software because I hate using something that I can not understand. I do not say that I can understand everything nor that I want to understand everything, but knowing that someone / some company intentionally prevents me from understanding how things work is really unacceptable to me. Secondly, and more importantly, free software is a requirement to prevent abuses regarding human rights and environmental care. Humanity can not rely on tools that are in the hands of small group of people. What do you see as the disadvantages of Skolelinux / Debian Edu? Again, I don't know this project enough. Maybe a dedicated website? Debian wiki works well for documentation, but is not very appealing to someone discovering the project. Also, as Skolelinux / Debian Edu uses OpenLDAP, it probably means that Windows workstations cannot use centralized authentication. Maybe the project could use Samba as an Active Directory domain controller instead, allowing Windows desktop usage when necessary. (Editors note: In fact Windows workstations can use the centralized authentication in a Debian Edu setup, at least for some versions of Windows, but the fact that this is not well known can be seen as an indication of the need for better documentation and marketing. :) Which free software do you use daily? Nothing original: Debian testing/sid with Gnome desktop, Firefox, Thunderbird, LibreOffice Which strategy do you believe is the right one to use to get schools to use free software? Every effort to spread free software into schools is important, whatever it is. But I think, at least where I live, that IT professionals maintaining schools networks are still very "Microsoft centric". Schools will use any working solution, but they need people to install and maintain it. How to make these professionals sensitive about free software and train them with solutions like Debian Edu / Skolelinux is a really good question :-)

10 May 2020

Enrico Zini: Fraudsters and pirates

Adelheid Luise "Adele" Spitzeder ([ a dl ha t a de l p t tse d ]; 9 February 1832 27 or 28 October 1895), also known by her stage name Adele Vio, was a German actress, folk singer, and con artist. Initially a promising young actress, Spitzeder became a well-known private banker in 19th-century Munich when her theatrical success dwindled. Running what was possibly the first recorded Ponzi scheme, she offered large returns on investments by continually using the money of new investors to pay back the previous ones. At the height of her success, contemporary sources considered her the wealthiest woman in Bavaria.
Anne Bonny (possibly 1697 possibly April 1782)[1][2] was an Irish pirate operating in the Caribbean, and one of the most famous female pirates of all time.[3] The little that is known of her life comes largely from Captain Charles Johnson's A General History of the Pyrates.
Mary Read (1685 28 April 1721), also known as Mark Read, was an English pirate. She and Anne Bonny are two of the most famed female pirates of all time, and among the few women known to have been convicted of piracy during the early 18th century, at the height of the "Golden Age of Piracy".
While piracy was predominantly a male occupation, a minority of pirates were women.[1] On many ships, women (as well as young boys) were prohibited by the ship's contract, which all crew members were required to sign.[2] :303

4 May 2020

Dima Kogan: Redirection and /dev/stderr

I just hit some unexpected unix-ism (or maybe Linux-ism?) that I'd like to mention here. I found a workaround, but if anybody knows what's actually happening and can enlighten me, please send me an email, and I'll update the post. OK, so I have a program that does stuff, and outputs its progress to stderr. And I'm invoking this from a shell script that also outputs stuff to stderr. A minimized sample:
echo "Outer print 1111" > /dev/stderr
perl -E 'say STDERR ("1111 1111 1111 1111 1111 1111 1111 1111\n")'
echo "Outer print 2222" > /dev/stderr
perl -E 'say STDERR ("2222 2222 2222 2222 2222 2222 2222 2222\n")'
Let's call this dothing.sh. This works just fine. Now let's say I want to log the output to a file. Naturally I do this:
./dothing.sh 2> /tmp/log
Surprisingly, this does not work:
$ bash dothing.sh 2> /tmp/log && cat /tmp/log
Outer print 2222
2222 2222 2222 2222 2222 2222 2222 2222
$ bash dothing.sh 2> /tmp/log && xxd /tmp/log
0000000: 4f75 7465 7220 7072 696e 7420 3232 3232  Outer print 2222
0000010: 0a00 0000 0000 0000 0000 0000 0000 0000  ................
0000020: 0000 0000 0000 0000 0032 3232 3220 3232  .........2222 22
0000030: 3232 2032 3232 3220 3232 3232 2032 3232  22 2222 2222 222
0000040: 3220 3232 3232 2032 3232 3220 3232 3232  2 2222 2222 2222
0000050: 0a0a                                     ..
The 1111 prints are gone, and we now have a block of binary 0 bytes in there for some reason. I had been assuming that writes to stderr block until they're finished. So I can, without thinking about it, mix writing to fd 2 and opening, and then writing to /dev/stderr. Apparently the right way to do this is to write to fd 2 in the script directly, instead of opening /dev/stderr:
echo "Outer print 1111" >&2
perl -E 'say STDERR ("1111 1111 1111 1111 1111 1111 1111 1111\n")'
echo "Outer print 2222" >&2
perl -E 'say STDERR ("2222 2222 2222 2222 2222 2222 2222 2222\n")'
Why?

Update So I poked at it for a bit more, and it turns out that the obvious scapegoat (buffering) is actually not the issue. The problem is this:

$ ls -l /dev/stderr(:A)
-rw-r--r-- 1 dima dima 36 May  4 17:02 /tmp/log
:A is the zsh syntax for recursive link-following. /dev/stderr is thus ultimately a link to /tmp/log. So the file on disk /tmp/log is being opened for writing and written-to twice at the same time
  • once in the outer 2>/tmp/log redirection
  • again in the inner >/dev/stderr redirection
Now we know. Thanks to Larry Doolittle for pointers.

3 May 2020

Fran ois Marier: Backing up to a GnuBee PC 2

After installing Debian buster on my GnuBee, I set it up for receiving backups from my other computers.

Software setup I started by configuring it like a typical server but without a few packages that either take a lot of memory or CPU: I changed the default hostname:
  • /etc/hostname: foobar
  • /etc/mailname: foobar.example.com
  • /etc/hosts: 127.0.0.1 foobar.example.com vogar localhost
and then installed the avahi-daemon package to be able to reach this box using foobar.local. I noticed the presence of a world-writable directory and so I tightened the security of some of the default mount points by putting the following in /etc/rc.local:
mount -o remount,nodev,nosuid /etc/network
mount -o remount,nodev,nosuid /lib/modules
chmod 755 /etc/network
exit 0

Hardware setup My OS drive (/dev/sda) is a small SSD so that the GnuBee can run silently when the spinning disks aren't needed. To hold the backup data on the other hand, I got three 4-TB drives drives which I setup in a RAID-5 array. If the data were valuable, I'd use RAID-6 instead since it can survive two drives failing at the same time, but in this case since it's only holding backups, I'd have to lose the original machine at the same time as two of the 3 drives, a very unlikely scenario. I created new gpt partition tables on /dev/sdb, /dev/sdbc, /dev/sdd and used fdisk to create a single partition of type 29 (Linux RAID) on each of them. Then I created the RAID array:
mdadm /dev/md127 --create -n 3 --level=raid5 -a /dev/sdb1 /dev/sdc1 /dev/sdd1
and waited more than 24 hours for that operation to finish. Next, I formatted the array:
mkfs.ext4 -m 0 /dev/md127
and added the following to /etc/fstab:
/dev/md127 /mnt/data/ ext4 noatime,nodiratime 0 2
To reduce unnecessary noise and reduce power consumption, I also installed hdparm:
apt install hdparm
and configured all spinning drives to spin down after being idle for 10 minutes by putting the following in /etc/hdparm.conf:
/dev/sdb  
       spindown_time = 120
 
/dev/sdc  
       spindown_time = 120
 
/dev/sdd  
       spindown_time = 120
 
and then reloaded the configuration:
 /usr/lib/pm-utils/power.d/95hdparm-apm resume
Finally I setup smartmontools by putting the following in /etc/smartd.conf:
/dev/sda -a -o on -S on -s (S/../.././02 L/../../6/03)
/dev/sdb -a -o on -S on -s (S/../.././02 L/../../6/03)
/dev/sdc -a -o on -S on -s (S/../.././02 L/../../6/03)
/dev/sdd -a -o on -S on -s (S/../.././02 L/../../6/03)
and restarting the daemon:
systemctl restart smartd.service

Backup setup I started by using duplicity since I have been using that tool for many years, but a 190GB backup took around 15 hours on the GnuBee with gigabit ethernet. After a friend suggested it, I took a look at restic and I have to say that I am impressed. The same backup finished in about half the time.

User and ssh setup After hardening the ssh setup as I usually do, I created a user account for each machine needing to backup onto the GnuBee:
adduser machine1
adduser machine1 sshuser
adduser machine1 sftponly
chsh machine1 -s /bin/false
and then matching directories under /mnt/data/home/:
mkdir /mnt/data/home/machine1
chown machine1:machine1 /mnt/data/home/machine1
chmod 700 /mnt/data/home/machine1
Then I created a custom ssh key for each machine:
ssh-keygen -f /root/.ssh/foobar_backups -t ed25519
and placed it in /home/machine1/.ssh/authorized_keys on the GnuBee. On each machine, I added the following to /root/.ssh/config:
Host foobar.local
    User machine1
    Compression no
    Ciphers aes128-ctr
    IdentityFile /root/backup/foobar_backups
    IdentitiesOnly yes
    ServerAliveInterval 60
    ServerAliveCountMax 240
The reason for setting the ssh cipher and disabling compression is to speed up the ssh connection as much as possible given that the GnuBee has avery small RAM bandwidth. Another performance-related change I made on the GnuBee was switching to the internal sftp server by putting the following in /etc/ssh/sshd_config:
Subsystem      sftp    internal-sftp

Restic script After reading through the excellent restic documentation, I wrote the following backup script, based on my old duplicity script, to reuse on all of my computers:
# Configure for each host
PASSWORD="XXXX"  # use  pwgen -s 64  to generate a good random password
BACKUP_HOME="/root/backup"
REMOTE_URL="sftp:foobar.local:"
RETENTION_POLICY="--keep-daily 7 --keep-weekly 4 --keep-monthly 12 --keep-yearly 2"
# Internal variables
SSH_IDENTITY="IdentityFile=$BACKUP_HOME/foobar_backups"
EXCLUDE_FILE="$BACKUP_HOME/exclude"
PKG_FILE="$BACKUP_HOME/dpkg-selections"
PARTITION_FILE="$BACKUP_HOME/partitions"
# If the list of files has been requested, only do that
if [ "$1" = "--list-current-files" ]; then
    RESTIC_PASSWORD=$PASSWORD restic --quiet -r $REMOTE_URL ls latest
    exit 0
# Show list of available snapshots
elif [ "$1" = "--list-snapshots" ]; then
    RESTIC_PASSWORD=$GPG_PASSWORD restic --quiet -r $REMOTE_URL snapshots
    exit 0
# Restore the given file
elif [ "$1" = "--file-to-restore" ]; then
    if [ "$2" = "" ]; then
        echo "You must specify a file to restore"
        exit 2
    fi
    RESTORE_DIR="$(mktemp -d ./restored_XXXXXXXX)"
    RESTIC_PASSWORD=$PASSWORD restic --quiet -r $REMOTE_URL restore latest --target "$RESTORE_DIR" --include "$2"   exit 1
    echo "$2 was restored to $RESTORE_DIR"
    exit 0
# Delete old backups
elif [ "$1" = "--prune" ]; then
    # Expire old backups
    RESTIC_PASSWORD=$PASSWORD restic --quiet -r $REMOTE_URL forget $RETENTION_POLICY
    # Delete files which are no longer necessary (slow)
    RESTIC_PASSWORD=$PASSWORD restic --quiet -r $REMOTE_URL prune
    exit 0
# Catch invalid arguments
elif [ "$1" != "" ]; then
    echo "Invalid argument: $1"
    exit 1
fi
# Check the integrity of existing backups
RESTIC_PASSWORD=$PASSWORD restic --quiet -r $REMOTE_URL check   exit 1
# Dump list of Debian packages
dpkg --get-selections > $PKG_FILE
# Dump partition tables from harddrives
/sbin/fdisk -l /dev/sda > $PARTITION_FILE
/sbin/fdisk -l /dev/sdb > $PARTITION_FILE
# Do the actual backup
RESTIC_PASSWORD=$PASSWORD restic --quiet --cleanup-cache -r $REMOTE_URL backup / --exclude-file $EXCLUDE_FILE
I run it with the following cronjob in /etc/cron.d/backups:
30 8 * * *    root  ionice nice nocache /root/backup/backup-machine1-to-foobar
30 2 * * Sun  root  ionice nice nocache /root/backup/backup-machine1-to-foobar --prune
in a way that doesn't impact the rest of the system too much. Finally, I printed a copy of each of my backup script, using enscript, to stash in a safe place:
enscript --highlight=bash --style=emacs --output=- backup-machine1-to-foobar   ps2pdf - > foobar.pdf
This is actually a pretty important step since without the password, you won't be able to decrypt and restore what's on the GnuBee.

28 April 2020

Thomas Lange: FAI 5.9.4, Ubuntu 20.04 support, FAIme service

The new FAI version 5.9.4 adds support for the new Ubuntu LTS version 20.04 (focal). New FAI installation images (including a Ubuntu only ISO) are available from https://fai-project.org/fai-cd I've added support for the Debian testing release (currently bullseye) to the FAIme service for building customized installation and cloud images. This service still supports the oldstable and stable release including variants with a backports kernel. The FAI.me build service is also using the newest FAI version and the customized ISO images can be booted in an UEFI or legacy BIOS environment. https://fai-project.org/FAIme

27 April 2020

Dirk Eddelbuettel: #26: Upgrading to R 4.0.0

Welcome to the 26th post in the rationally regularized R revelations series, or R4 for short. R 4.0.0 was released two days ago, and a casual glance at some social media conversations appears to suggest quite some confusion, almost certainly some misunderstandings, and possibly also a fair amount of fear, uncertainty, and doubt about the process. So I thought I could show how I upgrade my own main workstation, live and in colour without a safety net. (Almost: I did upgrade my laptop yesterday which went swimmingly, if more slowly.) So here is a fresh video about upgrading to R 4.0.0, with some support slides as usual:

The slides used in the video are at this link. A few quick follow-ups to the live nature of this. The pbdZMQ package did in fact install smoothly once the (Ubuntu) -dev packages for Zero MQ were (re-)installed; then IRkernel also followed. BioConductor completed once I realized that GOSemSim needed the annotation package GO.db to be updated, that allowed MNF to install. So the only bug, really, was the circular depdency between pkgload and testthat. Overall, not bad at all for a quick afternoon session! And as mentioned, if you are interested and have questions concerning use of R on a .deb based system like Debain or Ubuntu (or Mint or ), the r-sig-debian list is a very good and friendly place to ask them. If you like this or other open-source work I do, you can now sponsor me at GitHub. For the first year, GitHub will match your contributions.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.

26 April 2020

Enrico Zini: Some Italian women

Artemisia Gentileschi - Wikipedia
art history people archive.org
Artemisia Lomi or Artemisia Gentileschi (US: / d nt l ski, -ti -/, Italian: [arte mi zja d enti leski]; July 8, 1593 c. 1656) was an Italian Baroque painter, now considered one of the most accomplished seventeenth-century artists working in the dramatic style of Caravaggio. In an era when women had few opportunities to pursue artistic training or work as professional artists, Artemisia was the first woman to become a member of the Accademia di Arte del Disegno in Florence and had an international clientele.
Maria Pellegrina Amoretti (1756 1787), was an Italian lawyer. She is referred to as the first woman to graduate in law in Italy, and the third woman to earn a degree.
Laura Maria Caterina Bassi (October 1711 20 February 1778) was an Italian physicist and academic. She received a doctoral degree in Philosophy from the University of Bologna in May 1732. She was the first woman to earn a professorship in physics at a university. She is recognized as the first woman in the world to be appointed a university chair in a scientific field of studies. Bassi contributed immensely to the field of science while also helping to spread the study of Newtonian mechanics through Italy.
Maria Gaetana Agnesi (UK: / n je zi/ an-YAY-zee,[1] US: / n -/ ahn-,[2][3] Italian: [ma ri a ae ta na a zi, - e z-];[4] 16 May 1718 9 January 1799) was an Italian mathematician, philosopher, theologian, and humanitarian. She was the first woman to write a mathematics handbook and the first woman appointed as a mathematics professor at a university.[5]
Elena Lucrezia Cornaro Piscopia (US: /k r n ro p sko pi /,[4] Italian: [ lena lu kr ttsja kor na ro pi sk pja]) or Elena Lucrezia Corner (Italian: [kor n r]; 5 June 1646 26 July 1684), also known in English as Helen Cornaro, was a Venetian philosopher of noble descent who in 1678 became one of the first women to receive an academic degree from a university, and the first to receive a Doctor of Philosophy degree.
Maria Tecla Artemisia Montessori (/ m nt s ri/ MON-tiss-OR-ee, Italian: [ma ri a montes s ri]; August 31, 1870 May 6, 1952) was an Italian physician and educator best known for the philosophy of education that bears her name, and her writing on scientific pedagogy. At an early age, Montessori broke gender barriers and expectations when she enrolled in classes at an all-boys technical school, with hopes of becoming an engineer. She soon had a change of heart and began medical school at the Sapienza University of Rome, where she graduated with honors in 1896. Her educational method is still in use today in many public and private schools throughout the world.
Rita Levi-Montalcini OMRI OMCA (US: / le vi mo nt l t i ni, l v-, li vi m nt l -/, Italian: [ ri ta l vi montal t i ni]; 22 April 1909 30 December 2012) was an Italian Nobel laureate, honored for her work in neurobiology. She was awarded the 1986 Nobel Prize in Physiology or Medicine jointly with colleague Stanley Cohen for the discovery of nerve growth factor (NGF). From 2001 until her death, she also served in the Italian Senate as a Senator for Life. This honor was given due to her significant scientific contributions. On 22 April 2009, she became the first Nobel laureate ever to reach the age of 100, and the event was feted with a party at Rome's City Hall. At the time of her death, she was the oldest living Nobel laureate.
Margherita Hack Knight Grand Cross OMRI (Italian: [mar e ri ta (h)ak]; 12 June 1922 29 June 2013) was an Italian astrophysicist and scientific disseminator. The asteroid 8558 Hack, discovered in 1995, was named in her honour.
Samantha Cristoforetti (Italian pronunciation: [sa manta kristofo retti]; born 26 April 1977, in Milan) is an Italian European Space Agency astronaut, former Italian Air Force pilot and engineer. She holds the record for the longest uninterrupted spaceflight by a European astronaut (199 days, 16 hours), and until June 2017 held the record for the longest single space flight by a woman until this was broken by Peggy Whitson and later by Christina Koch. She is also the first Italian woman in space. Samantha Cristoforetti is also known as the first person who brewed an espresso in space.

20 April 2020

Norbert Preining: Gaming: What Remains of Edith Finch

I never thought I could finish a game which is completely linear, has hardly any interaction necessary, hardly any riddles, no fighting. What Remains of Edith Finch taught be differently. And it is amazing.
A friend recently pointed me at a blog about casual games, and surprisingly I found two games I have played on the list: Firewatch and The Witness. One of the other games on the list was What Remains of Edith Finch. This games was lurking in my Steam library for quite some time, and I realized I actually started playing it long ago, but only for a few minutes, before having given up, back then. What a failure I realized! The games plays completely in the now deserted house of the family Finch. The youngest member of the family returns with a key to the house and uncovers the stories of her family. This is about all that is happening in the game. And it is so well done that I couldn t stop playing (wouldn t it be for my daughter interrupting me), and leaves you with the feeling to replay as soon as possible. The graphics are very well done, beautiful scenery, lots of love to details. The story progresses by walking (completely linearly) through the house, and text fragments appearing around you, telling part of the story, small hints, little secrets, everything that makes up a tangible set of family memories.
Exploring the house filled with locked rooms sealed as shrines for the deceased members of the family, Edith uncovers one by one the final moments of her family members, a family seemingly cursed. In these stories the player dives into the world and playing the role of the family members, re-living events of the past.
As I wrote in the beginning don t expect fights, don t expect riddles, but be prepared for an emotional roller coaster, for a deep dive into a well written family history with lots of weird twists. An absolute great game with a playing time of around 2h.

19 April 2020

Russ Allbery: Review: Beyond the Galaxy

Review: Beyond the Galaxy, by Ethan Siegel
Publisher: World Scientific
Copyright: 2016
ISBN: 981-4667-16-1
Format: Kindle
Pages: 370
In the preface of this book, Ethan Siegel recounts his experience as a new college professor in 2009, thrilled to learn that he would be teaching the college's introductory astronomy class. The only disappointment was that he could not find a textbook that described astronomy the way that he wanted to teach it. Siegel did not want to simply describe the current astronomical understanding. He wanted to start at the beginning and tell a story. What questions did we start with? How did we answer them? What new questions did those answers provoke? I enjoyed Sabine Hossenfelder's Lost in Math, but I'm even happier that she included in it a recommendation of Beyond the Galaxy as a good introduction to modern astronomy. I am completely in agreement with Siegel: Astronomy is interesting however it is described, but the best presentation for the interested lay person who does not intend to become a professional astronomy is chronological. (I feel the same way about physics and mathematics.) The narrative structure of scientific discovery draws me in every time. It's so satisfying to see our knowledge growing, breakthrough by breakthrough, only to meet the next puzzling inconsistency. It also is a natural fit for bringing someone up to speed on a field, since the history of the field starts with simpler questions and problems, and the complications of later discoveries build on the gaps left by earlier theories. Siegel tells that story well. Beyond the Galaxy starts with observations of seasonal changes in the path of the Sun through the sky and phases of the moon, quickly moves on to Eratosthenes's calculation of the circumference of the Earth, and continues at pace through early astronomy. The first chapter brings the reader up to the start of the 20th century, after which Siegel slows down and spends the remaining 10 chapters on the last 100 years: special and general relativity, the expansion of the universe, the Big Bang, dark matter, dark energy, the inflationary period, and more. For me, this was perfect. The story of early astronomy and the fight over the heliocentric model of the universe is worth telling, but it's been told many times before and features prominently in history books outside of science classes. The weight of material in this book matched my interest: What new developments have there been after general relativity and the Big Bang theory? What inconsistencies are dark matter and dark energy explaining? What is the inflationary period and how did it modify the Big Bang theory? (My half-formed impression of this part of astronomy from news articles turned out to be almost entirely wrong.) And how do we know all of this? The question of how we know as much as we do about the early origins of the universe turned out to be far more interesting than I had realized. It's one of those pieces of science where, when given only the conclusions, it's hard to imagine how our theories could be as complete as they are. Siegel is a bit repetitive in how he talks about theory development and occasionally skims over the details to avoid getting too deep into techniques and math, but he does a great job explaining the predictions of a theory, the design of experiments to prove or disprove those predictions, and the implications for the boundaries of what we know. This is the first time someone has explained the theorized origin of matter-antimatter asymmetry in sufficient detail that I was able to understand and internalize it. Dark matter and dark energy are the current topics of astronomy that get the most press, and the coverage of both is very good here. I was particularly fascinated by the link between dark matter and the superstructures of the universe that we've discovered. Astronomy does scale in a way that no other science can manage, and the scale of structure we've discovered and been able to map has gone up considerably since the last time I refreshed my astronomical knowledge. If you're looking for a math-light, comprehensive introduction to modern astronomy, I can wholeheartedly recommend this book. That goes double if you, like me, prefer a chronological view of scientific discovery so that you can understand what questions people were trying to answer and how our understanding changed over time. One note on format: Astronomy being what it is, this book is very heavy on pictures. It is not at all suitable for a dedicated ebook reader. The Kindle tries, but the combination of a small screen and black and white e-ink fail miserably. I switched to reading on a tablet, and that was a far better experience. The Kindle app still struggles to put the figures next to the text that discusses them, but that's a typesetting problem that I often have with physical books as well. If you don't have a tablet and you aren't willing to read on a computer screen, you probably want a physical copy of this one (which, sadly, means academic textbook pricing). Rating: 8 out of 10

13 April 2020

Giovanni Mascellani: DKIM for Debian Developers

What is DKIM? DKIM (DomainKeys Identified Mail), as Wikipedia puts it, "is an email authentication method designed to detect forged sender addresses in emails (email spoofing), a technique often used in phishing and email spam". More prosaically, one of the reasons email spam is so abundant is that, given a certain email message, there is no simple way to know for certain who sent it and how reputable they are. So even if people having addresses @debian.org are very nice and well-behaving, any random spammer can easily send emails from whatever@debian.org, and even if you trust people from @debian.org you cannot easily configure your antispam filter to just accept all emails from @debian.org, because spammers would get in too. Since nearly ten years DKIM is there to help you. If you send an email from @debian.org with DKIM, it will have a header like this:
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=debian.org;
    s=vps.gio.user; t=1586779391;
    bh=B6tckJy2cynGjNRdm3lhFDrp0tD7fF8hS4x0FCfLADo=;
    h=From:Subject:To:Date:From;
    b=H4EDlATxVm7XNqPy2x7IqCchBUz1SxFtUSstB23BAsdyTKJIohM0O4RRWhrQX+pqE
     prPVhzcfNALMwlfExNE69940Q6pMCuYsoxNQjU7Jl/UX1q6PGqdVSO+mKv/aEI+N49
     vvYNgPJNLaAFnYqbWCPI8mNskLHLe2VFYjSjE4GJFOxl9o2Gpe9f5035FYPJ/hnqBF
     XPnZq7Osd9UtBrBq8agEooTCZHbNFSyiXdS0qp1ts7HAo/rfrBfbQSk39fOOQ5GbjV
     6FehkN4GAXFNoFnjfmjrVDJC6hvA8m0tJHbmZrNQS0ljG/SyffW4OTlzFzu4jOmDNi
     UHLnEgT07eucw==
The field d=debian.org is the domain this email claims to be from and the fields bh= and b= are a cryptographic public key signature certifying this fact. How do I check that the email is actually from @debian.org? I use the selector s=vps.gio.user to fetch the public key via DNS, and then use the public key to verify the signature.
$ host -t TXT vps.gio.user._domainkey.debian.org
vps.gio.user._domainkey.debian.org descriptive text "v=DKIM1; k=rsa; s=email; h=sha256; p=" "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM/W/kxtKWT58Eak0cfm/ntvurfbkkvugrG2jfvSMnHHkFyfJ34Xvn/HhQPLwX1QsjhuLV+tW+BQtxY7jxSABCee6nHQRBrpDej1t86ubw3CSrxcg1mzJI5BbL8un0cwYoBtUvhCYAZKarv1W2otCGs43L0s" "GtEqqtmYN/hIVVm4FcqeYS1cYrZxDsjPzCEocpYBhqHh1MTeUEddVmPHKZswzvllaWF0mgIXrfDNAE0LiX39aFKWtgvflrYFKiL4hCDnBcP2Mr71TVblfDY0wEdAEbGEJqHR1SxvWyn0UU1ZL4vTcylB/KJuV2gMhznOjbnQ6cjAhr2JYpweTYzz3wIDAQAB"
There it is! Debian declares in its DNS record that that key is authorized to sign outbound email from @debian.org. The spammer hopefully does not have access to Debian's DKIM keys, and they cannot sign emails. Many large and small email services have already deployed DKIM since years, while most @debian.org emails still do not use it. Why not? Because people send @debian.org emails from many different servers. Basically, every DD used their @debian.org address sends email from their own mail server, and those mail servers (fortunately) do not have access to Debian's DNS record to install their DKIM keys. Well, that was true until yesterday! :-) A few weeks ago I poked DSA asking to allow any Debian Developer to install their DKIM keys, so that DDs could use DKIM to sign their emails and hopefully reduce the amount of spam sent from @debian.org. They have done it (thank you DSA very much, especially adsb), and now it is possible to use it! How do I configure it? I will not write here a full DKIM tutorial, there are many around. You have to use opendkim-genkey to generate a key and then configure your mail server to use opendkim to digitally sign outbound email. There are a few Debian-specific things you have to care about, though. First the have to choose a selector, which is a string used to distinguish many DKIM keys belonging to the same domain. Debian allows you to installa a key whose selector is <something>.<uid>.user, where <uid> is your Debian uid (this is done both for namespacing reasons and for exposing who might be abusing the system). So check carefully that your selector has this form. Then you cannot edit directly Debian's DNS record. But you can use the email-LDAP gateway on db.debian.org to install your key in a way similar to how entries in debian.net are handled (see the updated documentation). Specifically, suppose that opendkim-genkey generated the following thing for selector vps.gio.user and domain debian.org:
vps.gio.user._domainkey IN  TXT ( "v=DKIM1; h=sha256; k=rsa; "
      "p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM/W/kxtKWT58Eak0cfm/ntvurfbkkvugrG2jfvSMnHHkFyfJ34Xvn/HhQPLwX1QsjhuLV+tW+BQtxY7jxSABCee6nHQRBrpDej1t86ubw3CSrxcg1mzJI5BbL8un0cwYoBtUvhCYAZKarv1W2otCGs43L0sGtEqqtmYN/hIVVm4FcqeYS1cYrZxDsjPzCEocpYBhqHh1MTeUE"
      "ddVmPHKZswzvllaWF0mgIXrfDNAE0LiX39aFKWtgvflrYFKiL4hCDnBcP2Mr71TVblfDY0wEdAEbGEJqHR1SxvWyn0UU1ZL4vTcylB/KJuV2gMhznOjbnQ6cjAhr2JYpweTYzz3wIDAQAB" )  ; ----- DKIM key vps.gio.user for debian.org
Then you have to carefully copy the content of the p= field (without being fooled by it being split between different strings) and construct a request of the form:
dkimPubKey: vps.gio.user MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM/W/kxtKWT58Eak0cfm/ntvurfbkkvugrG2jfvSMnHHkFyfJ34Xvn/HhQPLwX1QsjhuLV+tW+BQtxY7jxSABCee6nHQRBrpDej1t86ubw3CSrxcg1mzJI5BbL8un0cwYoBtUvhCYAZKarv1W2otCGs43L0sGtEqqtmYN/hIVVm4FcqeYS1cYrZxDsjPzCEocpYBhqHh1MTeUEddVmPHKZswzvllaWF0mgIXrfDNAE0LiX39aFKWtgvflrYFKiL4hCDnBcP2Mr71TVblfDY0wEdAEbGEJqHR1SxvWyn0UU1ZL4vTcylB/KJuV2gMhznOjbnQ6cjAhr2JYpweTYzz3wIDAQAB
and then send it GPG-signed to changes@db.debian.org:
echo 'dkimPubKey: vps.gio.user blahblahblah'   gpg --clearsign   mail changes@db.debian.org
Then use host -t TXT vps.gio.user._domainkey.debian.org to chech the key gets published (it will probably take some minutes/hours, I don't know). Once it is published, you can enable DKIM in you mail server and your email will be signed. Congratulations, you will not look like a spammer any more! You can send an email to check-auth@verifier.port25.com to check that your setup is correct. They will reply with a report, including the success of DKIM test. Notice that currently Debian's setup only allows you to use RSA DKIM keys and doesn't allow you to set other DKIM fields (but you probably won't need to set them). EDIT DSA made an official announcement about DKIM support, which you might want to check out as well, together with its links. EDIT 2 Now ed25519 keys are supported, the syntax for specifying keys on LDAP is a little bit more flexible and you can also insert CNAME records. See the official documentation for the updated details. So we have solved our problems with spam? Ha, no! DKIM is only a small step. Useful, also because it enable other steps to be taken in the future, but small. In particular, DKIM enables you to say: "This particular email actually comes from @debian.org", but doesn't tell anybody what to do with emails that are not signed. A third-party mail server might wonder whether @debian.org emails are actually supposed to be signed or not. There is another standard for dealing with that, which is called DMARD, and I believe that Debian should eventually use it, but not now: the problem is that currently virtually no email from @debian.org is signed with DKIM, so if DMARC was enabled other mail servers would start to nuke all @debian.org emails, except those which are already signed, a minority. If people and services sending emails from @debian.org will start configuring DKIM on their servers, which is now possible, it will eventually come a time when DMARC can be enabled, and spammers will find themselves unable to send forged @debian.org emails. We are not there yet, but todays we are a little step closer than yesterday. Also, notice that having DKIM on @debian.org only counters spam pretending to be from @debian.org, but there is much more. The policy on what to accept is mostly independent on that on what you send. However, knowing that @debian.org emails have DKIM and DMARC would mean that we can set our spam filters to be more aggressive in general, but whitelist official Debian Developers and services. And the same can be done for other domains using DKIM and DMARC. Finally, notice that some incompatibilities between DKIM and mailing lists are known, and do not have a definitive answer yet. Basically, most mailing list engines modify either the body of the headers in forwarded emails, which means that DKIM does not validate any more. There are many proposed solutions, possibly none completely satisfying, but since spam is not very satisfying as well, something will have to be worked out. I wrote a lot already, though, so I wont't discuss this here.

Shirish Agarwal: Migrant worker woes and many other stories

I was gonna use this blog post to share about the migrant worker woes as there has been multiple stories doing the rounds. For e.g. a story which caught the idea of few people but most of us, i.e. middle-class people are so much into our own thing that we care a fig leaf about what happens to migrants. This should not be a story coming from a humane society but it seems India is no different than any other country of the world and in not a good way. Allow me to share
Or for those who don t like youtube, here s an alternative link https://www.invidio.us/watch?v=JGEgZq_1jmc Now the above two editorial shares two stories, one of Trump retaliatory threat to India in the Q&A of the journalist. In fact, Trump has upped the ante on visa sanctions as India buckled so easily under pressure. There have been other stories doing the rounds how people who have illnesses who need HCQ in India are either dying or are close to death because of unavailability of HCQ in the medicine shop. There have been reports in Pune as well as South Mumbai (one of the poshest localities in Mumbai/Bombay) that medicine shops are running empty or emptier. There have been so many stories on that, with reporters going to shops and asking owners of the medicine shops and shop-owners being clueless. I think the best article which vividly describes the Government of India (GOI) response to the pandemic is the free-to-read article shared by Arundhati Roy in Financial Times. It has reduced so much of my work or sharing that it s unbelievable. And she has shared it with pictures and all so I can share other aspects of how the pandemic has been affecting India and bringing the worst out in the Government in its our of need. In fact, not surprisingly though, apparently there was also a pro-Israel similar thing which happened in Africa too . As India has too few friends now globally, hence it decided to give a free pass to them.

Government of India, news agencies and paid News One of the attempts the state tried to do, although very late IMHO is that it tried to reach out to the opposition i.e. Congress party and the others. Mrs. Sonia Gandhi, who is the Congress president asked that the Government should not run any of its ads on private television channels for a period of two years. There had been plenty of articles, both by medianama and others who have alleged that at least from the last 6 odd years, Government ads. comprise of almost 50-60% advertising budget of a channel advertising budget. This has been discussed also in medianama s roundtable on online content which happened few months back. While an edited version is out there on YT, this was full two day s event which happened across two different cities.
or the alternative to youtube https://www.invidio.us/watch?v=c1PhWR1-Urs It was as if the roundtable discussions were not enough, Mrs. Gandhi clarion call was answered by News Broadcaster s Association (NBA) and this is what they had to say
News Broadcasters Association reply to Mrs. Gandhi
To put it simply, NBA deplored the suggestion by Mrs. Gandhi and even called the economy in recession and all they had were the Government s own advertising budget to justify their existence. The statements in themselves are highly pregnant and reveal both the relationship that the media, print or mainstream news channels have with the Government of India. Now if you see that, doesn t it make sense that media always slants the story from the Government s perspective rather than remaining neutral. If my bread basket were on the onus of me siding with the Govt. that is what most sane persons would do, otherwise they would resign and leave which many reporters who had a conscience did. Interestingly enough, the NBA statement didn t just end there but also used the word recession , this is the term that Government of India (GOI) hates and has in turn has been maintaining the word, terminology slowdown . While from a layman s perspective the two terms may seem to be similar, if India has indeed been in recession then the tools and the decisions that should have been taken by GOI should have been much different than what they took. Interestingly, enough GOI has refrained from saying anything on the matter which only reveals their own interests in the matter. Also if an association head is making the statement, it is more than likely that he consulted a lawyer or two and used application of mind while drafting the response. In other words, or put more simply, this was a very carefully drafted letter because they know that tomorrow the opposition party may come into power so they don t want to upset the power dynamics too much.

Privacy issues arising due to the Pandemic On the same Financial Times, two stories which dealt with the possible privacy violations due to the Pandemic have been doing the rounds. The first one, by Yuval Noah Harari is more exploratory by nature and makes some very good points without going far too deep into specific instances of recent times but rather goes into history and past instances where Governments have used the pandemics to exert more control over their populace and drive their agenda. I especially liked the last few lines which he shared in his op-ed Even if the current administration eventually changes tack and comes up with a global plan of action, few would follow a leader who never takes responsibility, who never admits mistakes, and who routinely takes all the credit for himself while leaving all the blame to others. Yuval Noah Harari . The whole statement could right fit onto the American President which he was talking about while at the same time, fits right into the current Indian Prime Minister, Boris Johnson of UK and perhaps Jair Bolsanaro of Brazil. All these three-four individuals have in common is that most of them belong to right-wing and hence cater only to the rich industrialist s agenda. While I don t know about Jair Bolsanaro much, at least three out of four had to turn to socialism and had to give some bailout packages to the public at large, even though continuing to undermine their own actions. More on this probably a bit down the line. The second story shared by Nic Fildes and Javier Espinoza who broke the story of various surveillance attempts and the privacy concerns that people have. Even the Indian PMO has asked this data and because there was no protest by the civil society, a token protest was done by COAI (Cellular Operator Association of India) but beyond that nothing, I am guessing because the civil society didn t make much noise as everybody is busy with their own concerns of safety and things going on, it s possible that such data may have gone to the Government. There is not much new here that people who had been working on the privacy issues know, it s just how easy Governments are finding to do it. The part of informed consent is really a misnomer . Governments lie all the time, for e.g. in the UK, did the leave party and people take informed consent, no they pushed their own agenda. This is and will be similar in many countries of the world.

False Socialism by RW parties In at least the three countries I have observing, simply due to available time, that lot of false promises are being made by our leaders and more often than not, the bailouts will be given to already rich industrialists. An op-ed by Vivek Kaul, who initially went by his handle which means somebody who is educated but unemployed. While Vivek has been one-man army in revealing most of the Government s mischiefs especially as fudging numbers are concerned among other things, there have been others too. As far as the US is concerned, an e-zine called free press (literally) has been sharing Trump s hollowness and proclamations for U.S. . Far more interestingly, I found New York times investigated and found a cache of e-mails starting from early January, which they are calling Red Dawn . The cache is undeniable proof that medical personnel in the U.S. were very much concerned since January 2020 but it was only after other countries started lock-down that U.S. had to follow suit. I am sure Indian medical professionals may have done similar mail exchanges but we will never know as the Indian media isn t independent enough.

Domestic violence and Patriarchy There have been numerous reports of domestic violence against women going up, in fact two prominent publications have shared pieces about how domestic violence has gone up in India since the lockdown but the mainstream press is busy with its own tropes, the reasons already stated above. In fact, interestingly enough, most women can t wear loose fitting clothes inside the house because of the near ones being there 24 7 . This was being shared as India is going through summer where heat waves are common and most families do not have access to A/C s and rely on either a fan or just ventilation to help them out. I can t write more about this as simply I m not a woman so I haven t had to face the pressures that they have to every day. Interestingly though, there was a piece shared by arre. Interestingly, also arre whose content I have shared a few times on my blog has gone from light, funny to be much darker and more serious tone. Whether this is due to the times we live in is something that a social scientist or a social anthropologist may look into in the times to come. One of the good things though, there hasn t been any grid failures as no industrial activity is happening (at all). In fact SEB s (State Electricity Boards) has shown a de-growth in electricity uptake as no industrial activity has been taken. While they haven t reduced any prices (which they ideally should have) as everybody is suffering.

Loot and price rise Again, don t think it is an Indian issue but perhaps may be the same globally. Because of broken supply chains, there are both real and artificial shortages happening which is leading to reasonable and unreasonable price hikes in the market. Fresh veggies which were normally between INR 10/- to INR 20/- for 250 gm have reached INR 40/- 50/- and even above. Many of the things that we have to become depend upon are not there anymore. The shortage of plastic bottles being case in point.
Aryan Plastic bottle
This and many others like these pictures have been shared on social media but it seems the Government is busy doing something else. The only thing we know for sure is that the lock-down period is only gonna increase, no word about PPE s (Personal Protection Equipment) or face masks or anything else. While India has ordered some, those orders are being diverted to US or EU. In fact, many doctors who have asked for the same have been arrested, sacked or suspended for asking such inconvenient questions, although whether in BJP ruled states or otherwise. In fact, the Centre has suspended MPLADS funds , members of parliament get funds which they can use to provide relief work or whatever they think the money is best to spend upon.

Conditions of Labor in the Pandemic Another sort of depressing story has been how the Supreme Court CJI Justice SA Bobde has made statements and refrained from playing any role in directing the Center to provide relief to the daily wage laborers. In fact, Mr. Bobde made statements such as why they need salaries if they are getting food. This was shared by barandbench, a site curated by lawyers and reporters alike. Both livelaw as well as barandbench have worked to enhance people s awareness about the legal happenings in our High Courts and Supreme Court. And while sadly, they cannot cover all, they at least do attempt to cover a bit of what s hot atm. The Chief Justice who draws a salary of INR 250,000 per month besides other perks is perhaps unaware or doesn t care about fate of millions of casual workers, 400 460 million workers who will face abject poverty and by extension even if there are 4 members of the family so probably 1.2 billion people will fall below the poverty line. Three, four major sectors are going to be severely impacted, namely Agriculture, Construction and then MSME (Micro, small and medium enterprises) which cover everything from autos, industrial components, FMCG, electronics, you name it, it s done by the MSME sector. We know that the Rabi crop, even though it was gonna be a bumper crop this year will rot away in the fields. Even the Kharif crop whose window for sowing is at the most 2-3 weeks will not be able to get it done in time. In fact, with the extended lockdown of another 21 days, people will probably return home after 2 months by which time they would have nothing to do there as well as here in the cities. Another good report was done by the wire, the mainstream media has already left the station.

Ministry of Public Health There was an article penned by Dr. Edmond Fernandes which he published last year. The low salary along with the complexities that Indian doctors are and may face in the near future are just mind-boggling.

The Loss Losses have already started pouring in. Just today Air Deccan has ceased all its operations. I had loved Mr. Gopinath s airline which was started in the early 2000 s. While I won t bore you with the history, most of it can be seen from simplify Deccan . This I believe is just the start and it s only after the few months after the lock-down has been lifted would we really know the true extent of losses everywhere. And the more lenghthier the lockdown, the more difficult it would be businesses to ramp back. People have already diagnosed at the very least 15-20 sectors of the economy which would be hit and another similar or more number of sectors which will have first and second-order of losses and ramp-downs. While some guesses are being made, many are wildly optimistic and many are wildly pessimistic, as shared we would only know the results when the lockdown is opened up.

Predictions for the future While things are very much in the air, some predictions can be made or rationally deduced. For instance, investments made in automation and IT would remain and perhaps even accelerate a little. Logistics models would need to be re-worked and maybe, just maybe there would be talk and action in making local supply chains a bit more robust. Financing is going to be a huge issue for at least 6 months to a year. Infrastructure projects which require huge amount of cash upfront will either have to be re-worked or delayed, how they will affect projects like Pune Metro and other such projects only time will tell.

Raghuram Rajan Raghuram Rajan was recently asked if he would come back and let bygones be bygones. Raghuram in his own roundabout way said no. He is right now with Chicago Booth doing the work that he always love. Why would he leave that and be right in the middle of the messes other people have made. He probably gets more money, more freedom and probably has a class full of potential future economists. Immigration Control, Conferences and thought experiment There are so many clueless people out there, who don t know why it takes so long for any visa to be processed. From what little I know, it is to verify who you say you are and you have valid reason to enter the country. The people from home ministry verify credentials, as well as probably check with lists of known criminals and their networks world-wide. They probably have programs for such scenarios and are part and parcel of their everyday work. The same applies to immigration control at Airports. there has been a huge gap at immigration counters and the numbers of passengers who were flying internationally to and fro from India. While in India, we call them as Ministry of Home Affairs, in U.S. it s Department of Homeland security, other countries using similar jargons. Now even before this pandemic happened, the number of people who are supposed to do border control and check people was way less and there have been scenes of Air rage especially in Indian airports after people came after a long-distance flight. Now there are couple of thought experiments, just day before yesterday scientists discovered six new coronaviruses in bats and scientists in Iceland found 40 odd mutations of the virus on people. Now are countries going to ban people from Iceland as in time the icelandic people probably would have anti-bodies on all the forty odd mutations. Now if and when they come in contact onto others who have not, what would happen ? And this is not specifically about one space or ethnicity or whatever, microbes and viruses have been longer on earth than we have. In our greed we have made viruses resistant to antibiotics. While Mr. Trump says as he discovered it today, this has been known to the medical fraternity since tht 1950 s. CDC s own chart shows it. We cannot live in fear of a virus, the only way we can beat it is by understanding it and using science. Jon Cohen shared some of the incredible ways science is looking to beat this thing
or as again an alternative to youtube https://www.invidio.us/watch?v=MPVG_n3w_vM One of the most troubling question is how the differently-abled communities which don t have media coverage at the best of times, haven t had any media coverage at all during the pandemic. What are their stories and what they are experiencing ? How are they coping ? Are there anyways we could help each other ? By not having those stories, we perhaps have left them more vulnerable than we intend. And what does that speak about us, as people or as a community or a society ?

Silver Linings While there is not a lot to be positive about, one interesting project I came about is openbreath.tech . This is an idea, venture started by IISER (Indian Institute of Science Education and Research) , IUCAA (Inter-University Centre for Astronomy and Astrophysics). They are collaborating with octogeneraian Capt (Retd) Rustom Barucha from Barucha Instrumentation and Control, besides IndoGenius, New Delhi, and King s College, London. The first two institutes are from my home town, Pune. While I don t know much of the specifics of this idea other than that there is an existing Barucha ventilator which they hope to open-source and make it easier for people to produce their own. While I have more questions than answers at this point, this is something hopefully to watch out for in the coming days and weeks. The other jolly bit of good news has come from Punjab where after several decades, people in Northern Punjab are finally able to see the Himalayas or the Himalayan mountain range.
Dhauladhar range Northern Punjab Copyright CNN.Com
There you have it, What I have covered is barely scratching the surface. As a large section of the media only focuses on one narrative, other stories and narratives are lost. Be safe, till later.

10 April 2020

Norbert Preining: TeX Live 2020 released

Get the Champagne ready, we have released the final images of TeX Live 2020.
Due to COVID-19, DVD production will be delayed, but we have decided to release the current image and update the net installer. The .iso image is available on CTAN, and the net installer will pull all the newest stuff. Currently we are working on getting those packages updated during the freeze to the newest level in TeX Live. Before providing the full list of changes, here a few things I would like to pick out: Most of the above features have been available already either via tlpretest or via regular updates, but are now fully released on the DVD version. Thanks goes to all the developers, builders, the great CTAN team, and everyone who has contributed to this release! Finally, here are the changes as listed in the master TeX Live documentation: General: epTeX, eupTeX: New primitives \Uchar, \Ucharcat, \current(x)spacingmode, \ifincsname; revise \fontchar?? and \iffontchar. For eupTeX only: \currentcjktoken. LuaTeX: Integration with HarfBuzz library, available as new engines luahbtex (used for lualatex) and luajithbtex. New primitives: \eTeXgluestretchorder, \eTeXglueshrinkorder. pdfTeX: New primitive \pdfmajorversion; this merely changes the version number in the PDF output; it has no e ect on any PDF content. \pdfximage and similar now search for image les in the same way as \openin. pTeX: New primitives \ifjfont, \iftfont. Also in epTeX, upTeX, eupTeX. XeTeX: Fixes for \Umathchardef, \XeTeXinterchartoks, \pdfsavepos. Dvips: Output encodings for bitmap fonts, for better copy/paste capabilities (https://tug.org/TUGboat/tb40-2/tb125rokicki-type3search.pdf). MacTeX: MacTeX and x86_64-darwin now require 10.13 or higher (High Sierra, Mojave, and Catalina); x86_64-darwinlegacy supports 10.6 and newer. MacTeX is notarized and command line programs have hardened runtimes, as now required by Apple for install packages. BibDesk and TeX Live Utility are not in MacTeX because they are not notarized, but a README le lists urls where they can be obtained. tlmgr and infrastructure:

Dirk Eddelbuettel: Rcpp 1.0.4.6: Bug fix interim version

rcpp logo Rcpp 1.0.4 was released on March 17, following the usual sequence of fairly involved reverse-depends check along with a call for community testing issued weeks before the release. In that email I specifically pleaded with folks to pretty-please test non-standard setups:
It would be particularly beneficial if those with unsual build dependencies tested it as we would increase overall coverage beyond what I get from testing against 1800+ CRAN packages. BioConductor would also be welcome.
Alas, you can t always get what you want. Shortly after the release we were made aware that the two (large) pull request at the book ends of the 1.0.3 to 1.0.4 release period created trouble. Of these two, the earliest PR in the 1.0.4 release upset older-than-CRAN-tested installation, i.e. R 3.3.0 or before. (Why you d want to run R 3.3.* when R 3.6.3 is current is something I will never understand, but so be it.) This got addressed in two new PRs. And the matching last PR had a bit of sloppyness leaving just about everyone alone, but not all those macbook-wearing data scientists when using newer macOS SDKs not used by CRAN. In other words, unsual setups. But boy, do those folks have an ability to complain. Again, two quick PRs later that was addressed. Along came a minor PR with two more Rcpp::Shield<> uses (as life is too short to manually count PROTECT and UNPROTECT). And then a real issue between R 4.0.0 and Rcpp first noticed with RcppParallel builds on Windows but then also affecting RcppArmadillo. Another quickly issued fix. So by now the count is up to six, and we arrived at Rcpp 1.0.4.6. Which is now on CRAN, after having sat there for nearly a full week, and of course with no reason given. Because the powers that be move in mysterious ways. And don t answer to earthlings like us. As may transpire here, I am little tired from all this. I think we can do better, and I think we damn well should, or I may as well throw in the towel and just release to the drat repo where each of the six interim versions was available for all to take as soon as it materialized. Anyway, here is the state of things. Rcpp has become the most popular way of enhancing R with C or C++ code. As of today, 1897 packages on CRAN depend on Rcpp for making analytical code go faster and further, along with 191 in BioConductor. And per the (partial) logs of CRAN downloads, we are running steasy at one millions downloads per month. The changes for this interim version are summarized below.

Changes in Rcpp patch release version 1.0.4.6 (2020-04-02)
  • Changes in Rcpp API:
    • The exception handler code in #1043 was updated to ensure proper include behavior (Kevin in #1047 fixing #1046).
    • A missing Rcpp_list6 definition was added to support R 3.3.* builds (Davis Vaughan in #1049 fixing #1048).
    • Missing Rcpp_list 2,3,4,5 definition were added to the Rcpp namespace (Dirk in #1054 fixing #1053).
    • A further updated corrected the header include and provided a missing else branch (Mattias Ellert in #1055).
    • Two more assignments are protect with Rcpp::Shield (Dirk in #1059)
  • Changes in Rcpp Attributes:
    • Empty strings are not passed to R CMD SHLIB which was seen with R 4.0.0 on Windows (Kevin in #1062 fixing #1061).
  • Changes in Rcpp Deployment:
    • Travis CI unit tests now run a matrix over the versions of R also tested at CRAN (rel/dev/oldrel/oldoldrel), and coverage runs in parallel for a net speed-up (Dirk in #1056 and #1057).

Thanks to CRANberries, you can also look at a diff to the previous release. Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page. Bugs reports are welcome at the GitHub issue tracker as well (where one can also search among open or closed issues); questions are also welcome under rcpp tag at StackOverflow which also allows searching among the (currently) 2356 previous questions. If you like this or other open-source work I do, you can now sponsor me at GitHub. For the first year, GitHub will match your contributions.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.

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