- Roundtable - muug.ca

Hello from our presentation!
by Alberto Abrao 02 Sep '25

02 Sep '25

Just want something to change on my mailserver... -- Kind regards, Alberto Abrao

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Reminder: MUUG Meeting, Tonight, Sept 2, 7:30pm (BRAND NEW LOCATION) -- Kopia, RTFM: /bin Diving
by Gilbert Detillieux 02 Sep '25

02 Sep '25

A reminder that the MUUG meeting will be this evening, both in person and online. See below for details on BRAND NEW LOCATION... The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, September 2nd, at 7:30pm. Yes, that's the FIRST Tuesday of the month... Kopia Alberto Abrao will present and demo Kopia, a "Fast and Secure Open-Source Backup Software" solution. Kopia provides GUI and CLI on multiple platforms (Windows, macOS, and - of course - Linux), to make encrypted, compressed and dedup?ed backups to the cloud storage of your choice. RTFM: /bin Diving If time permits, we will also be taking a dive into the /bin, with this month's host Trevor Cordes. /bin Diving is our segment where we pick a random program in /bin to demo and discuss and learn about as a group. It's improv at its best! Where to find the Meeting: **NOTE BRAND 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 doors. 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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MUUG Meeting, Tuesday, Sept 2, 7:30pm (BRAND NEW LOCATION) -- Kopia, RTFM: /bin Diving
by Gilbert Detillieux 27 Aug '25

27 Aug '25

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, September 2nd, at 7:30pm. Yes, that's the FIRST Tuesday of the month... Kopia Alberto Abrao will present and demo Kopia, a "Fast and Secure Open-Source Backup Software" solution. Kopia provides GUI and CLI on multiple platforms (Windows, macOS, and - of course - Linux), to make encrypted, compressed and dedup?ed backups to the cloud storage of your choice. RTFM: /bin Diving If time permits, we will also be taking a dive into the /bin, with this month's host Trevor Cordes. /bin Diving is our segment where we pick a random program in /bin to demo and discuss and learn about as a group. It's improv at its best! Where to find the Meeting: **NOTE BRAND 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 doors. 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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small newsletter error
by Trevor Cordes 27 Aug '25

27 Aug '25

For the mb_strcut example, the byte count is actually 4 bytes (4B), not 3 as stated. That makes it a lame example. A better example is with 0,5 as parameters, which would give the same string result, and still 4B long... BUT it shows how the first byte of the accented "a" is just thrown away. My bad.

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MUUG e-mail/subscriptions security
by Hartmut W Sager 20 Aug '25

20 Aug '25

I just noticed on a MUUG Round Table e-mail today, the following at the bottom: > Roundtable mailing list -- roundtable(a)muug.ca > To unsubscribe send an email to roundtable-leave(a)muug.ca > Regarding the second line (the unsubscribe), I sure hope MUUG at least does SPF/DKIM verification before acting on such an incoming e-mail, because otherwise, a rogue actor out there could unsubscribe any or all of us! Even so, SPF/DKIM verification would only fully protect those of us (like me) who use our own domain name. Hartmut

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Re: Unixx In Yorkton
by Trevor Cordes 14 Aug '25

14 Aug '25

On 2025-08-12 Montana Quiring wrote: > Hello, > > I saw this in Yorkton, SK this weekend and thought you might get a > chuckle as well.: LOL At least they added an extra X to avoid trademark infringement :-) It would have been so much better if after "smokeing accessories" they listed "computers", even if just in jest. In reality, they probably have no idea...

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Reminder: MUUG 2025 BBQ, Tuesday, July 15, 6:30pm (BBQ Site #5, Assiniboine Park) - RSVP by today!
by Gilbert Detillieux 08 Jul '25

08 Jul '25

Reminder: The Manitoba UNIX User Group (MUUG) will be holding its annual summer BBQ, on Tuesday, July 15th, at 6:30pm. (The THIRD Tuesday of the month...) MUUG 2025 BBQ MUUG is having another summer BBQ and everyone is invited! Spouses, significant others, and children are also welcome to attend. Date: July 15th, 2025 Time: 6:30 pm Location: BBQ Site #5, Assiniboine Park (The exact same location as the last 2 years.) Burgers, hot dogs, and pop will be provided by MUUG. Feel free to bring your own food to share with others and your own beverages if you like. **RSVP Required TODAY!** Please RSVP via email to bbq(a)muug.ca, with the subject "MUUG BBQ", if you haven't already, so we know how much food we need to buy and bring. The group now holds its regular monthly 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/ -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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OpenBSD CDs and DVDs
by Vijay Sankar 05 Jul '25

05 Jul '25

Hi, As part of my downsizing project, I have now given away most of my prized possessions such as books and so on, and sold or given away most of my servers, laptops, and accessories. Sorry for the TMI but just wanted to set the stage for giving away OpenBSD which was a big part of my life since the 1990s :) I have all the OpenBSD CDs and DVDs ever released, I think — from 1998 onwards. Please let me know if any of you OpenBSD enthusiasts want the whole set and I will be happy to give that to you. There are also other things such as workstation desks and chairs and so on that you can have. You can look at those if it’s of interest, when you pick up the OpenBSD media. Thanks, Vijay Sent from my iPhone

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MUUG 2025 BBQ, Tuesday, July 15, 6:30pm (BBQ Site #5, Assiniboine Park) - RSVP by July 8
by Gilbert Detillieux 02 Jul '25

02 Jul '25

The Manitoba UNIX User Group (MUUG) will be holding its annual summer BBQ, on Tuesday, July 15th, at 6:30pm. (The THIRD Tuesday of the month...) MUUG 2025 BBQ MUUG is having another summer BBQ and everyone is invited! Spouses, significant others, and children are also welcome to attend. Date: July 15th, 2025 Time: 6:30 pm Location: BBQ Site #5, Assiniboine Park (The exact same location as the last 2 years.) Burgers, hot dogs, and pop will be provided by MUUG. Feel free to bring your own food to share with others and your own beverages if you like. **RSVP Required!** Please RSVP via email to bbq(a)muug.ca, with the subject "MUUG BBQ", before July 8th, so we know how much food we need to buy and bring. The group now holds its regular monthly 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/ -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.ca> Manitoba UNIX User Group Web: http://muug.ca/

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mysql GIS oddity: PointOnSurface not Contained?
by Trevor Cordes 19 Jun '25

19 Jun '25

(I lied, I'm using MariaDB 10.11.11, but it's mostly the same as latest MySQL for GIS.) I have multipolygons (1+ polygons making up 1 geometric shape). (They bound the US states.) I use ST_PointOnSurface to grab a random point on/inside one of these multipolys (using my states dataset). But when I do a ST_Contains search using that point, on the exact same geometry I used to get the point, some states are getting the result where the point is not within the state!! My whole goal is to turn a state into a point and then have that point be within the state, using existing MySQL functions. In my mind, this should ALWAYS work, instead of returning 0 rows: SELECT * FROM states WHERE ST_Contains(multipolygon, (SELECT ST_PointOnSurface(multipolygon) FROM states WHERE abbr='tx') ) I did find: https://lin-ear-th-inking.blogspot.com/2007/06/subtleties-of-ogc-covers-spa… Where the guy says Contains doesn't include the boundary of the poly itself! That would explain it. He says better/newer systems have a Cover fn which will make the above work as intended. Mysql/Maria don't seem to have that (yet?). So I tried emulating it... after all I should be able to use Intersects or something to cover the case where it's on the boundary itself. But it doesn't find a match either. I tried every function Maria offers and none will find the point ST_PointOnSurface gives me within the original multipolygons. I'm not sure why the point-on-boundary type functions like Intersects aren't finding anything. Maybe because we're dealing with a zillion decimal places, nothing is really on the boundary. I think I could use Centroid instead of PointOnSurface, but then I'd also have to yank out just 1 polygon instead of the multi, because the centroid is not guaranteed to be on the surface! And even then, a pahtological shape of the single poly (say a donut) would also have a centroid not on the surface, right? Argh... Yes, I checked the point ST_PointOnSurface returns for TX and it's legit in TX, a little farther north than the Rio Grande, in what appears to be the southernmost point of TX. If anyone has any ideas, it would make my day! Ideally an idea on how to emulate Cover would work; or ways to get a point a little more "inside" the polygon without worrying if we are still inside the polygon or not! Thanks!

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