- Roundtable - muug.ca

suppress broken pipe error
by Trevor Cordes 28 Dec '25

28 Dec '25

I have a little bit of bash (see bottom) that basically checks to see if any box is pingable on the LAN. But with a trick: it'll quit/return the instant it gets a single reply. That's so my script doesn't have to wait for nmap to finish (which can take a minute vs maybe 1 sec for the first computer to respond). It works great. One problem though... on one box only, sometimes (not always) I'll get a: grep: write error: Broken pipe in the output. I would like to suppress that error. I ran bash with -x and the grep error appears in the debug output after the grep -q RCVD line... however I'm not sure that's not a red herring as the entire stanza may be counted as one line for the debug? And I fail to see how there can be a write error on that part of the pipe -- there's nothing it's piping to! A read error, sure. But write? Yes, the kill makes huge swathes of the pipe just "go away", and maybe that's part of it. But I'm trying to redirect most 2>&1's as you can see. I don't need to solve the "problem" of pipes disappearing, I just want it to shut up. I also want to solve it without putting the meat of the code into a separate script (that seems like cheating). Any ideas? sint=192.168.100 timeout 20 bash -c \ " \ (nmap -ddd -vvv --send-ip \ --host-timeout 5s --max-rtt-timeout 1s --initial-rtt-timeout 500ms \ --max-retries 1 -S $sint.1 -sn -PE $sint.2 $sint.100-254 2>&1 & \ echo \$! >&3) \ 3>pidnmap \ | grep --line-buffered -P 'RCVD.{0,30}?ICMP.{0,60}?Echo reply' \ | (head -1 && /bin/kill \$(<pidnmap) >/dev/null 2>&1) \ " \ |grep -q RCVD || { # do some network-restart stuff }

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ECC motherboards w/PCIe x16?
by Adam Thompson 13 Dec '25

13 Dec '25

Since we’ve been talking about ECC… I’m looking for a motherboard that does ECC *and* has a real PCIe x16 slot on it. Right now, the best deal I can find is C$360 for a GigaByte MX33-BS0 and … a used Xeon E-2314 off eBay for C$200, so ~C$560. (Not including RAM, yikes.) Supposedly, AMD chips as cheap as the AMD Ryzen 5 7600X (C$250) support ECC, if paired with the right motherboard – which I’m not sure even exists. I want 32GB minimum (preferably supports 64GB+), a “real” x16 slot, and either a real x4 slot or an onboard 10G SFP+ NIC… but even PCPartPicker has no idea which AM5 mobos support ECC! From Reddit, the other usual source, I learn that I can basically “try one and see”, which isn’t what I want at all! Should I just pay mildly silly amounts of money for a previous-generation Intel solution? I can go get a used Dell PowerEdge 720 for not much money, and I have the rack to put it in, but I really really really do not want the PERC RAID controllers they all come with. (I don’t mind Dells of that era, they would otherwise be perfectly fine.) -Adam athompso(a)athompso.net<mailto:athompso@athompso.net> Feel free to email me directly rather than cluttering the list with commercial emails, if you have something you can sell me directly. P.S. yes I’m aware that many, but definitely not all, Dell PERCs can be reflashed to IT mode, but that creates issues with the Lifecycle Controller and some BIOS revisions. And when buying used, it’s hard to be certain which PERC is included – the R720 could come with, IIRC, 9 different RAID cards.

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I created some handy Ubuntu scripts for running updates to share
by andrea kaplen 05 Dec '25

05 Dec '25

Hey Folks, I created two bash scripts 1. checkforupdates.sh 2. showhardware.sh They are on github in my repo. https://github.com/andreak3779/awk_linux_scripts Feel to offer any advice, modify them or tell me if you find them helpful. Have a wonderful weekend.

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Linus Torvalds says ECC is mandatory for his PC's
by Bradford C. Vokey 02 Dec '25

02 Dec '25

Linus Tech Tips recently posted a video about building the PERFECT Linux PC with the actual Linus Torvalds: - full entertaining video: https://youtu.be/mfv0V1SxbNA?si=AkLZOlwuf3nKqZ7F - just the short part talking about ECC: https://www.youtube.com/watch?v=mfv0V1SxbNA&t=510s --- So Linus Torvalds (and of course our very own MUUG vice-president Trevor Cordes) need ECC when their computers are responsible for bisecting or merging their own kernels. I get that. But can't the rest of us on non-ECC memory people just simply reset our computers and continue on? Debate started... :) -- Bradford C. Vokey Treasurer Manitoba Unix User Group

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MUUG Meeting, Tuesday, Dec 2, 7:30pm (NEW LOCATION) -- Round-Table, Show & Tell, and Pot Luck
by Gilbert Detillieux 25 Nov '25

25 Nov '25

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, December 2nd, at 7:30pm. Yes, that's the FIRST Tuesday of the month... Round-Table, Show & Tell, and Pot Luck As 2025 draws to a close, MUUG continues the now 14-year-old traditon of turning the December meeting into more of an informal, social event. Kevin Abedi has graciously arranged to let us use Skullspace, at 374 Donald St., as our venue again. We will have our usual round-table session, as well as a few show-&-tell items presented. Bring your favourite gadget! We will have the usual (brief) round-table session, some time for mingling, eating, and drinking, maybe followed by a couple short gadget show-&-tell presentations, and then more time for mingling, eating, and drinking. This will be an in-person pot-luck snack event! Members are encouraged to bring their own food to sample and share with others. (Finger food works best.) Feel free to bring your own special drink as well - just remember that we don't have a liquor license! But please, stay home if you are sick. We will also attempt to simulcast the live round-table and short presentations over BigBlueButton for those that can't attend in person for any reason, whether snow, or sleet, or illness. Where to Find the Meeting: Skullspace, at 374 Donald St. We will be in room 200. Please note that this location is not mobility accessible. There are 3 flights of stairs and it is 1.5 stories up. There is no Winnipeg Jets home game on December 2nd so close downtown street parking should be plentiful and easy to find. One of the best blocks for street parking is Notre Dame after Hargrave. There are also several commercial parking lots in the area including right behind the Skullspace building. The F8 bus route has a southbound stop (#10667) on the same block of Donald, in front of the Yellow Dog Tavern. It's also reasonable to walk from stops on Graham, Portage, Smith, King, and Notre Dame. Doors will be open starting at 7:15 pm with the meeting starting at 7:30 pm. After 7:45 pm the doors may be locked so you will need to call the Skullspace number (204-480-4092) and we'll answer and come down to let you in. Food Bank Donations Requested As in previous years, we are combining our pot luck event with a food drive for Harvest Manitoba. Any member who donates at least $1 or brings at least 1 food item will be given an entry into the door prize! Just like last year, any cash donation made to Harvest Manitoba at this event will be matched dollar for dollar by Bradford Vokey (up to a total $500 limit)! Last year MUUG members donated $128 (an appropriate power of 2) which Brad had to match for a total donation of $256 to Harvest Manitoba. Let's all chip in to make Brad donate more! Top 10 Most-Wanted Food Items 1. Canned Fruit 6. Pasta Sauce 2. Canned Soup/Stew 7. Rice 3. Canned Tuna 8. Peanut Butter 4. Canned Vegetables 9. Baby Formula/Food 5. Pasta 10. Instant Oatmeal Online option: For those unable or preferring not to attend in person, the meeting will also be available online, using BBB as usual. 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 now holds its meetings at 7:30pm on the *first* 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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Fedora 41 -> 42 upgrade
by Trevor Cordes 25 Nov '25

25 Nov '25

F41 is EOL in a few days. So I upgraded using the dnf method, as usual. Warning! If you have 2 different architectures of some rpms installed, which is likely if you use WINE, then a bug may trigger where the migration from separate /sbin to combined /bin & /sbin doesn't work properly. It will leave you with a decent mess to contend with. Probably the best idea is to find all those other-arch rpms and dnf remove them first. Then run the upgrade. Then reinstall the other-arch rpms. Obviously you'll need to record what rpms those are. Hopefully the bug won't trigger on "normal" installs without 2 arches... I will find out soon.

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Regex testing TUI!
by Adam Thompson 13 Nov '25

13 Nov '25

This looked quite interesting: GitHub - vitor-mariano/regex-tui: A simple TUI to visualize regular expressions right in your terminal. https://github.com/vitor-mariano/regex-tui -Adam Get Outlook for Android<https://aka.ms/AAb9ysg>

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My retirement, and Linux SysAdmin posting
by Gilbert Detillieux 13 Nov '25

13 Nov '25

Howdy folks. I've mentioned this to some of you already, but I'm planning on retiring from the UofM at the end of March next year. I've posted information on the "jobs" mailing list about the posting of a Linux SysAdmin job, open right now (closing Nov 21), with a proposed January 5 start date. If you missed that e-mail, you can find it in the archive... https://muug.ca/maillists.php https://muug.ca/hyperkitty/list/jobs@muug.ca/ Gilbert -- Gilbert Detillieux Computer Science University of Manitoba Winnipeg MB CANADA R3T 2N2

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muug.mb.ca decomissioned for email
by Trevor Cordes 10 Nov '25

10 Nov '25

We have decommissioned muug.mb.ca for incoming email as of today. If you have aliases/contacts/whatever set to use that domain for email, please update them to muug.ca. muug.mb.ca will continue to work for other purposes, such as web access. We are disabling email to it to reduce incoming spam.

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Reminder: MUUG Meeting, Tonight, Nov 4, 7:30pm (NEW LOCATION) -- RTFM: /bin Diving x 2
by Gilbert Detillieux 04 Nov '25

04 Nov '25

A reminder that the MUUG meeting will be this evening, both in person and online. See below for details on NEW LOCATION... The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, November 4th, at 7:30pm. Yes, that's the FIRST Tuesday of the month... RTFM: /bin Diving, Deutero-leanin' We are keeping it simple and interactive this month: a double /bin dive. Trevor Cordes will be walking us through the fun. /bin diving is a segment where we select a command at random on the spot and everyone gets to work out what it does and what it's good for. Collaboration and improv at its finest. It always ends up being interesting and you're guaranteed to learn something new! AGM Plus, this month's meeting will be the MUUG annual general meeting, which includes the election of the MUUG board of directors for the 2025-2026 year (usually by acclamation). Where to find the Meeting: **NOTE NEW LOCATION** Winnipeg Senior Citizens Radio Club, 598 St. Mary?s Road, 2nd Floor WSC is located at 598 St. Mary's Road, 2nd Floor, a block South from the St. Mary's / St. Anne's fork, on the West side beside the Miller's Meats. It's in the old fire hall, so you really can't miss it! Look for the red door. There is no elevator, so attendees will have to be able to climb a flight of stairs. Apologies to anyone requiring accessibility. There are a limited number of parking spaces for WSC around the building. If you arrive early you'll probably snag one. If not, there is parking available on the nearby streets, such as Mager Dr, or the streets off of St. Mary's such as Blenheim or Clonard Ave. Be careful not to park in nearby private parking lots unless otherwise indicated. For those unable or preferring not to attend in person, the meeting will also be available online, using BBB as usual. 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 now holds its meetings at 7:30pm on the *first* 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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