- Roundtable - muug.ca

Check your hardware acceleration settings!
by Alberto Abrao 09 May '22

09 May '22

Hello everyone, in anticipation of our meeting tomorrow, it may be a good idea to check your browser's hardware acceleration settings, especially if you were having issues before. First of all, Chromium used to be a lot more "daring" than Firefox. That has changed somewhat: if you had issues on previous meetings, now is a good time to try both browsers again and see which one performs better. Also, Nvidia is a cluster-yeah, as is tradition. Always remember Linus' words of wisdom. If your card is new enough (aka anything past 7xx series, if I recall correctly), you probably want the proprietary driver, as nouveau does not work with them well - if at all - because of the signed firmware blobs they use. Intel/AMD is smooth sailing. If you're hurting, a few packages usually bring extra features that gets all the juice out of the card. I won't go into specifics, this is very hardware/distribution dependent. A lot more can be done to "massage" both browsers into submission, but there is the potential for things to blow up. If you have issues during meetings that disabling video streaming is enough to solve, reach out to me and I will try to see if there's anything I can do to assist. For Firefox: - First of all, make sure you're running the latest version. Hardware acceleration was greatly improved in the last 5 or so versions. Here's a quick primer: 1) at the address bar, type "about:support" 2) Scroll down to "Graphics". On "Compositing", you want to see "WebRender", *NOT* WebRender (Software). 3) If you see WebRender (Software), you may want to force it. There be dragons, and you have been warned: - At the address bar, type about:config - There, search for gfx.webrender.all. Double click on it to enable. For Chromium: Type chrome://gpu at the address bar. - If Video Encode/Decode is enable, you're golden. - If not, and other things such as OpenGL/Canvas/Compositing are, you may be good enough. CPU utilization will be high, but it'll plow through if your machine is new enough - and by that I mean most circa-2011 and up x86 processors. Exceptions that come to my mind are some AMD A-series, C-series, and E-series (Ax-xxxx, C-xx etc) but you will be able to use hardware acceleration with these, so using the CPU to "plow through" is a moot point. - Still, if you want to force whatever you can, do the following: 1) type chrome://flags at the address bar. Enable (preferably one at a time, testing in-between): - Override software rendering list - Hardware-accelerated mjpeg decode for captured frame - Accelerated 2D canvas - Hardware decode acceleration for k-SVC VP9 2) Test. If you have issues, disable some and/or all. If you want to try some stuff on your own, the ArchLinux Wiki has some good resources, although you have to translate the packages it references to the equivalent in your distro. I hope that helps. If you have any questions, please reach out here and we'll talk. Kind regards, Alberto Abrao

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MUUG Online Meeting, Tuesday, May 10, 7:30pm -- AWS Fargate
by Gilbert E. Detillieux 04 May '22

04 May '22

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting online, on Tuesday, May 10th, at 7:30pm: Running Containers in the Cloud With AWS Fargate AWS Fargate is a serverless container solution that greatly simplifies the infrastructure required to run containerized applications. Without the need for Kubernetes or physical hosts, containerized apps can be quickly created and scaled with ease. This will once again be an online meeting. Stay tuned to our muug.ca home page for the official URL, which will be made available about a half hour before the meeting starts. (Reload the page if you don't see the link, or if there are issues with connecting.) The group holds its meetings at 7:30pm on the second Tuesday of every month from September to June. (There are no meetings in July and August.) Meetings are open to the general public; you don't have to be a MUUG member to attend. For more information about MUUG, and its monthly meetings, check out their web server: https://muug.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board, or linking to it on social media: https://muug.ca/meetings/MUUGmeeting.pdf -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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Fw: [SECURITY] Fedora 34 Update: gzip-1.10-5.fc34
by Trevor Cordes 01 May '22

01 May '22

Ugh, seriously? This is such basic shell escape security. Also: vim gets yet another sec update. Begin forwarded message: -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2022-6b512ae9e5 2022-04-30 18:40:14.825912 -------------------------------------------------------------------------------- Name : gzip Update Information: zgrep applied to a crafted file name with two or more newlines can no longer overwrite an arbitrary, attacker-selected file. reproducer: $ touch foo.gz $ echo foo | gzip > "$(printf '|\n;e touch pwned\n#.gz')" $ zgrep foo *.gz (the unfixed version of zgrep creates the file called pwned)

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An amusing stories about the use of Null
by Bill Reid 15 Apr '22

15 Apr '22

For those who have dealt with Null values in programming and databasesyou will find this quite amusing. This week on Radiolab... FORWARD TO A FRIEND <https://view.lists.wnyc.org/ftaf.aspx?qs=2d681a26e860f810ff89eb73d5f2eb03ce…> VIEW IN BROWSER <https://view.lists.wnyc.org/?qs=2d681a26e860f810ff89eb73d5f2eb03ce90c4010e4…> BECOME A MEMBER <https://click.lists.wnyc.org/?qs=7a5991c4989f1900d10893d11f327f837b2a475569…> <https://click.lists.wnyc.org/?qs=7a5991c4989f190037fd844f763204af09b62e3f66…> (Photo by Ben Hershey) *New episode on the podcast feed: NULL <https://click.lists.wnyc.org/?qs=7a5991c4989f1900f20e9a7b7538a4e8a4689ad00b…>* Several years ago, computer engineer Joseph Tartaro changed his license plate to read: “NULL.” It was an experiment. With this new plate, he wondered, would he ever get a traffic ticket again? Underlying his question was a simple fact: to a computer, “NULL” means empty. This week we find out what happened to Joseph (spoiler, it didn’t go as planned) and hear from folks who feel cursed by their last name Null. Read: a list of all the wrong assumptions about names that are embedded in the code of many web sites <https://click.lists.wnyc.org/?qs=7a5991c4989f190032e4b676c40400773c4f957485…>. Listen to "NULL" <https://click.lists.wnyc.org/?qs=7a5991c4989f190072c82ce1228fb9ce403313e048…> -------------------------------------------------------------------------------- --------------------------------------------------------------------------------

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Reminder: MUUG Online Meeting, Tonight, Apr 12, 7:30pm -- Cloud-init
by Gilbert E. Detillieux 12 Apr '22

12 Apr '22

A reminder that the MUUG online meeting will be on BBB this evening... The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting online, on Tuesday, April 12th, at 7:30pm: Cloud-init Kevin McGregor will provide an overview of cloud-init, a widely-supported way to initialize instances of cloud-aware distros (i.e. pretty much all of them!) on your public, private or home cloud. This will once again be an online meeting. Stay tuned to our muug.ca home page for the official URL, which will be made available about a half hour before the meeting starts. (Reload the page if you don't see the link, or if there are issues with connecting.) The group holds its meetings at 7:30pm on the second Tuesday of every month from September to June. (There are no meetings in July and August.) Meetings are open to the general public; you don't have to be a MUUG member to attend. For more information about MUUG, and its monthly meetings, check out their web server: https://muug.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board, or linking to it on social media: https://muug.ca/meetings/MUUGmeeting.pdf -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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MUUG Online Meeting, Tuesday, Apr 12, 7:30pm -- Cloud-init
by Gilbert E. Detillieux 05 Apr '22

05 Apr '22

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting online, on Tuesday, April 12th, at 7:30pm: Cloud-init Kevin McGregor will provide an overview of cloud-init, a widely-supported way to initialize instances of cloud-aware distros (i.e. pretty much all of them!) on your public, private or home cloud. This will once again be an online meeting. Stay tuned to our muug.ca home page for the official URL, which will be made available about a half hour before the meeting starts. (Reload the page if you don't see the link, or if there are issues with connecting.) The group holds its meetings at 7:30pm on the second Tuesday of every month from September to June. (There are no meetings in July and August.) Meetings are open to the general public; you don't have to be a MUUG member to attend. For more information about MUUG, and its monthly meetings, check out their web server: https://muug.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board, or linking to it on social media: https://muug.ca/meetings/MUUGmeeting.pdf -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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Skullspace Hax festival April 1-3 may interest MUUG members
by Mark Jenkins 01 Apr '22

01 Apr '22

Hey MUUG folks, My latest project has been organizing an event at our local hackerspace Skullspace this upcoming weekend (with online participation options as well) It's a weekend festival that includes a movie night, talks, a DJ evening and a chill out day with exhibits and gaming. https://hax.skullspace.ca I don't have any talks that are about unix-like systems specifically, but I am happy to report that I will be running my live streams using GNU/Linux and obs-studio. One interesting problem I solved recently was figuring out how to incorporate live footage from a Go Pro Hero 9 into my live stream. My recent notes on this are a github gist at https://is.gd/kgCSHA --------- Another free/libre/open-source software angle is that I'm planning to host a game of Pioneers, a computer clone of the board game Catan. (one of the elements with remote participation) The Pioneers client and server are packed by many GNU/Linux distros. So, again, more info at https://hax.skullspace.ca Our building door may or may not be locked at certain times. If it's open, come up 1.5 flights of stairs to the 2nd floor. If the building door is closed, push the small white buzzer labeled "sksp" and wait for someone to come down. Mark Jenkins

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Operational Technology Security Half-Day Remote Symposium April 6
by Vicki Nemeth 29 Mar '22

29 Mar '22

It's out of Regina, it's not too early in the day, and it's free! I can think of people in industry, infrastructure and manufacturing who I want to send this to. Topics covered include new US regulations, working with ancient machinery and lost source code, and a Log4j case study. On GoToWebinar. https://www.meetup.com/Regina-Cyber-Security-for-Control-Systems/events/284… Vicki -- VickiNemethWriter.com

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We need to step up our server game!
by Bradford C. Vokey 29 Mar '22

29 Mar '22

Linus Tech Tips unboxes his new $1,000,000 server project... https://youtu.be/sl61lHwo3YE Does anybody have a spare million lying around? -- Bradford C. Vokey Treasurer Manitoba Unix User Group

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Remotely exploitable netfilter
by John Lange 16 Mar '22

16 Mar '22

When you're firewall is the vulnerability, it's probably not good. Posting for awareness. https://nvd.nist.gov/vuln/detail/CVE-2022-25636 John

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