March 2026 - Roundtable

Roundtable
by Tait Palsson 01 Apr '26

01 Apr '26

Hello MUUG Roundtable, Is it just me or is it impossible to burn a .iso to an optical disc? I have tried with dd, various iso writers on various distributions but these either grey out or do not list the target device, and with multiple pieces of hardware. I am always met with an error that the media is read-only when the disc drive is read and write. I also tried /dev/sr0 and its alias /dev/cdrom but nothing different happened. An internet search tells me that special software like wodim, growisofs, or Brasero could be needed. Why and is this just me? If dd did work I imagine that I could use bs= to bring down the write speed and improve accuracy. Sincerely, Tait

5 8

MUUG Meeting, Tuesday, Apr 7, 7:30pm (NEW LOCATION) -- Audio Files for the Audiophile
by Gilbert E. Detillieux 31 Mar '26

31 Mar '26

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting IN PERSON, on Tuesday, April 7th, at 7:30pm. Yes, that's the FIRST Tuesday of the month... Audio Files for the Audiophile In April’s presentation, Reb James will delve into the nuances of ripping audio CDs into a digital format. Playing on various devices is desirable; more importantly, archiving physical media into files for multiple backups. Discs can be damaged or lost. First is a discussion of suitable lossy/lossless audio formats. Reb tested available codecs in July 2024 with a new setup from previous types. Finally, the 7-step process that transforms audio into better quality than the original. Join us at the April meeting! 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 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. There is no elevator, so attendees will have to be able to climb a flight of stairs. Apologies to anyone requiring accessibility. *Please Remove Your Footwear!* To keep the carpets clean and dry, please remove your outdoor footwear at the top of the stairs. Feel free to bring a pair of indoor shoes, sandals, or Crocs to use indoors. *Entry Log Book:* To support WSC operations, we ask all guests to sign the log book provided by WSC as you enter the meeting space. Online Meeting 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/ -- Gilbert E. Detillieux <gedetil(a)gmail.com> Winnipeg MB CANADA

1 0

Re: DVD audio file type
by destiny2b＠wisdomtree.info 27 Mar '26

27 Mar '26

** Reply to note from Adam Thompson <athompso(a)athompso.net> Thu, 26 Mar 2026 02:19:13 +0000 > > It's entirely up to the playback device. If it can read a file off a CD, and > it *can* read DVDs, it usually can read the same file types. > What may be at issue is the DVD filesystem. It's quite possible the playback > device doesn't understand UDF filesystems, in which case you *might* be able > to make it work by burning an ISO9660 filesystem onto DVD media, but this is > very non-standard and may be far more trouble than is worth. One of my dvd players requires ISO9660 filesystem for mp3 disks. Other players here can do several codecs, do not specify a file system > In other words, is putting an MP3 file in CD works, and putting an MP3 file on > DVD doesn't, is has nothing to do with the file. > > Check the user manual for your playback device; it should tell you exactly > what formats and media are supported. And if it doesn't, tell us the make and > model of the device. For universal play capability, was thinking more of dvd video format using \video_ts with .vob files. Only audio instead of video. The app Lplex had a good description of process. Upsampling to 48khz required, particular with codecs. More effort than a simple audio cd. Thanks for response!

1 0

DVD audio file type
by destiny2b＠wisdomtree.info 26 Mar '26

26 Mar '26

While we are on a dvd discussion, what file type extension should be used to burn audio files to a dvd playable on a home dvd player? Some dvd players will read computer audio file extensions from usb connector or other inputs. They do not seem to read the same when on a dvd disk. R e b

2 1

Re: Roundtable iso write
by destiny2b＠wisdomtree.info 24 Mar '26

24 Mar '26

** Reply to note from Tait Palsson <votetaitpalsson(a)protonmail.com> Mon, 23 Mar 2026 22:06:58 +0000 > > line-height: normal; font-family: Helvetica, sans-serif;">Is it just me or is > it impossible to burn a .iso to an optical > disc?</span></div><div><br></div><div><span style="font-size: 12px; > line-height: normal; font-family: Helvetica, sans-serif;">I have tried with > dd, various iso writers on various distributions but these either grey out or > do not list the target device, and with multiple pieces of hardware.  I > am always met with an error that the media is read-only when the disc drive is > read and write. I also tried /dev/sr0 and its alias /dev/cdrom but nothing > different happened.</span></div><div><br></div><div><span style="font-size: > 12px; line-height: normal; font-family: Helvetica, sans-serif;">An internet > search tells me that special software like wodim, growisofs, or Brasero could > be needed.  Why and is > this just me?</span></div><div><br></div><div><span style="font-size: 12px; > line-height: normal; font-family: Helvetica, sans-serif;">If dd did work I > imagine that I could use bs= to bring down the write speed and improve > accuracy.</span></div><div><br></div><div><span style="font-size: 12px; > line-height: normal; font-family: Helvetica, > sans-serif;">Sincerely,</span></div><div><span style="font-size: 12px; > line-height: normal; font-family: Helvetica, sans-serif;">Tait</span></div><div><br></div><span></span> An .iso is a complete image of a disc, the same way .img files filled up a floppy drive. Whether dvd or cd must realize the following: DVD R + or - is Read-only as in burn complete image, write one time. DVD RW is Read/Write, needs to be formatted before write, can do multiple times. ISO is Read-only, use a DVD R disc. Read-only means Write Once! The drive could be: cd-r, cd-rw, dvd-r, dvd-rw, will read any of these types. Writing at slow speed a good idea. R e b

1 0

Computer Hardware
by Ken Yoga 16 Mar '26

16 Mar '26

Hi there, I was wondering if anyone has any hardware they are looking to get rid of. I’m particularly interested in non-x86 Unix machines, but mini PCs/thin clients are quite interesting as well. Heck, even x86 hardware for home-labbing, or netbook sized machines. Thanks, Ken

2 1

muug.ca server upgraded to Debian 13
by Trevor Cordes 13 Mar '26

13 Mar '26

The muug.ca mirror server has been upgraded from Debian 12 to 13. The upgrade took a few hours in the wee hours of March 13. If you encounter any issues with services/daemons please notify the board, or me directly (with MUUG in the subject). Nothing much has changed in the way of features: more of a maintenance release.

1 0

File attributes
by Kevin McGregor 05 Mar '26

05 Mar '26

Further to my question about the "." at the end of the permissions I saw on a file: On Oracle Linux 8.10 (minimal install, anyway) there is no "lsattr" command. Also, the file system is xfs and I think lsattr doesn't work on xfs. At any rate, I was able to install the "attr" command which supports xfs. I got this result: [root@cowsvtora810 ~]# cd /etc/sudoers.d [root@cowsvtora810 sudoers.d]# ls -l total 12 -r--r-----. 1 root root 26 Mar 3 02:56 ansible -r--r-----. 1 root root 25 Mar 3 02:56 packer -r--r----- 1 root root 26 Mar 3 16:54 systems [root@cowsvtora810 sudoers.d]# attr -l ansible Attribute "selinux" has a 31 byte value for ansible [root@cowsvtora810 sudoers.d]# attr -l packer Attribute "selinux" has a 27 byte value for packer [root@cowsvtora810 sudoers.d]# attr -l systems [root@cowsvtora810 sudoers.d]# attr -g selinux packer attr_get: No data available Could not get "selinux" for packer [root@cowsvtora810 sudoers.d]# getfattr --name selinux packer packer: selinux: Operation not supported [root@cowsvtora810 sudoers.d]# getfattr --name root.selinux packer packer: root.selinux: Operation not supported That's probably sufficient to answer my question. There are additional attributes and they relate to selinux. I don't need to pursue this any further than that, although if anyone knows what the 31- and 27-byte attribute values might be, I'm curious.

2 1

Reminder: MUUG Meeting, Tonight, Mar 3, 7:30pm (NEW LOCATION) -- NetworkManager
by Gilbert Detillieux 03 Mar '26

03 Mar '26

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, March 3rd, at 7:30pm. Yes, that's the FIRST Tuesday of the month... NetworkManager: The ifcfg (But Not) Way It's coming... are you ready? NetworkManager is a replacement for the venerable ifcfg or interfaces files that let you configure your network interfaces. Red Hat World(TM) forced every Fedora user to switch to NM in Fedora 41. And a great disturbance in the force was felt. Just as with systemd, your <insert slower distro here> will force you to abandon your cherished way of doing things one of these months/years. "But I love my simple text files!" - so did Trevor Cordes, who will demonstrate at the next meeting how to use NM as close to the ifcfg way as possible using nmconnection files. So when you're forced to change, you can spend 3 minutes on it instead of 3 days. 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 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. There is no elevator, so attendees will have to be able to climb a flight of stairs. Apologies to anyone requiring accessibility. *Please Remove Your Footwear!* To keep the carpets clean and dry, please remove your outdoor footwear at the top of the stairs. Feel free to bring a pair of indoor shoes, sandals, or Crocs to use indoors. *Entry Log Book:* To support WSC operations, we ask all guests to sign the log book provided by WSC as you enter the meeting space. Online Meeting 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/

1 0