The Linux Questions Thread: a bunch of pitfalls, but technically it's possible

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Linux Questions Thread: a bunch of pitfalls, but technically it's possible

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spankmeister: Jun 15, 2008

Naffer posted:

I almost feel bad asking this question but I really am out of my depth. I have a little Linux server running on an ARM CPU that runs TTRSS with a MySQL server with innodb. Roughly once a week, the MySQL server losses it's mind, declares a page corrupted and then proceeds to restart about once every few minutes to hours, successfully coming back up each time but then hitting the same bad page eventually. Rebooting the machine fixes absolutely everything until it reoccurs (with a different page this time). Using innochecksum doesn't find any problems with the database after a reboot. There aren't any filesystem problems that I can see either (I usually do a sudo touch /forcefsck before rebooting). I don't know what it's issue is. The storage for this machine is an SDcard which I assume MySQL doesn't care for.

Here is a snippet from my MySQL error log:
code:
InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 17819.
InnoDB: You may have to recover from a backup.
140902 13:34:14  InnoDB: Page dump in ascii and hex (16384 bytes):                                                                                    
InnoDB: End of page dump
140902 13:34:15  InnoDB: Page checksum 1324349533, prior-to-4.0.14-form checksum 4044056326
InnoDB: stored checksum 1238429946, prior-to-4.0.14-form stored checksum 4044056326
InnoDB: Page lsn 3 1177753966, low 4 bytes of lsn at page end 1177753966
InnoDB: Page number (if stored to page already) 17819,
InnoDB: space id (if created with >= MySQL-4.1.1 and stored already) 0
InnoDB: Page may be a BLOB page
InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 17819.
InnoDB: You may have to recover from a backup.
InnoDB: It is also possible that your operating
InnoDB: system has corrupted its own file cache
InnoDB: and rebooting your computer removes the
InnoDB: error.
The last statement there "It is also possible that your operating system has corrupted its own file cache and rebooting your computer removes the error", could that be what's happening? If so what would be a potential solution?

edit: Mysql version is 5.5.38-0ubuntu0.14.04.1, the database was created originally with a slightly different version I think.

edit2: Is my reading that this is mostly likely caused by a hardware error (faulty memory etc) correct?

I would guess so, and my first bet is on the SD card, those things are crap and not really meant for random access at all.

E: if the database was created with an older mysql you should run mysql_upgrade. (make a backup first)

spankmeister fucked around with this message at 00:40 on Sep 3, 2014

# ? Sep 3, 2014 00:37

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# ? May 9, 2024 23:17

Naffer: Oct 26, 2004; Not a good chemist

spankmeister posted:

I would guess so, and my first bet is on the SD card, those things are crap and not really meant for random access at all.

E: if the database was created with an older mysql you should run mysql_upgrade. (make a backup first)

I ran MySQL_upgrade and it said that everything was already upgraded but I forced it anyways for good measure. I found from searching that you can force the kernel to drop all it's file caches by running "echo 3 > /proc/sys/vm/drop_caches" as root (not sudo for whatever reason), so when it happens again I'm going to try that to see if I can at least avoid a reboot. If the corruption is only occurring in RAM it might point to a hardware problem other than the fact that the SDcard isn't really made to run a database off of.

# ? Sep 3, 2014 19:07

hazzlebarth: May 13, 2013

Naffer posted:

drop all it's file caches by running "echo 3 > /proc/sys/vm/drop_caches" as root (not sudo for whatever reason)

If you tried "sudo echo 3 > ..." then that doesn't work because the redirection is outside of the sudo scope. You can use "echo foo | sudo tee -a /path/to/file" as an alternative if you need elevated privileges to write to the destination.

# ? Sep 3, 2014 19:31

mod sassinator: Dec 13, 2006; I came here to Kick Ass and Chew Bubblegum,
and I'm All out of Ass

Argh, looks like printing doesn't work with my Canon MX870 in Ubuntu 14.04 LTS. Works perfectly in 12.04 LTS by just setting up a network printer, giving it my printer's hostname, and pointing it at the right driver. Same thing in 14.04 will add the printer, but any job added to the print queue just goes into a 'Held' state. Trying to force it to release the job will just put it back in held. Yeesh, I'm ready to throw in the towel on 14.04. No audio in youtube videos on Chrome, no flash in Chromium (even after install pepperflash player), and now printing is fubar. I dunno WTF Canonical is up to these days but it sure as heck isn't making Ubuntu better.

edit: WTF the job I sent just printed about 10 minutes later? Good grief.

mod sassinator fucked around with this message at 19:47 on Sep 3, 2014

# ? Sep 3, 2014 19:45

Cidrick: Jun 10, 2001; Praise the siamese

hazzlebarth posted:

If you tried "sudo echo 3 > ..." then that doesn't work because the redirection is outside of the sudo scope. You can use "echo foo | sudo tee -a /path/to/file" as an alternative if you need elevated privileges to write to the destination.

This is pedantic as gently caress but I've always liked "sudo sysctl -w vm.drop_caches=2" (or 3 in your case)

# ? Sep 3, 2014 23:40

TheEffect: Aug 12, 2013

I've installed a working web server on Debian multiple times in the past but I'm having what I'm guessing is the dumbest roadblock ever with CentOS 7.

When I do a "yum list installed" I don't see anything about Apache or Tomcat but when I navigate to my host on port 8080 I get the normal "If you're seeing this, you've successfully installed Tomcat. Congratulations!" message. Is that normal? If so, how come I cannot locate a "/var/www/html" directory anywhere?

# ? Sep 4, 2014 19:22

spankmeister: Jun 15, 2008

TheEffect posted:

I've installed a working web server on Debian multiple times in the past but I'm having what I'm guessing is the dumbest roadblock ever with CentOS 7.

When I do a "yum list installed" I don't see anything about Apache or Tomcat but when I navigate to my host on port 8080 I get the normal "If you're seeing this, you've successfully installed Tomcat. Congratulations!" message. Is that normal? If so, how come I cannot locate a "/var/www/html" directory anywhere?

It's called httpd in the redhat world, tomcat should just be tomcat though.

If you've only installed tomcat and not httpd then there will be no /var/www

spankmeister fucked around with this message at 19:28 on Sep 4, 2014

# ? Sep 4, 2014 19:26

minato: Jun 7, 2004; cutty cain't hang, say 7-up.; Taco Defender

Dunno about Tomcat, but the Apache package is called "httpd" which might explain why searching for Apache won't find it.

# ? Sep 4, 2014 19:26

telcoM: Mar 21, 2009; Fallen Rib

(As others have already said,) RedHat/CentOS packages Apache as "httpd", mainly because "RedHat always did it that way".

Tomcat is not primarily a file-based web server, although it could act as one when properly configured. Its primary job is to run Java servlets and JSPs to service HTTP(S) requests. The "If you're seeing this..." message is produced by a servlet named org.apache.catalina.servlets.DefaultServlet, configured in /etc/tomcat6/web.xml.

# ? Sep 4, 2014 19:42

TheEffect: Aug 12, 2013

Thanks for the explanation all. I do indeed see "httpd" so it looks like I'm set there.

Not sure why I couldn't find it yesterday after triple-checking but of course when I checked just now I can see my www folder. I might've needed to refresh FileZilla or something.

Thanks again.

# ? Sep 4, 2014 19:52

Vulture Culture: Jul 14, 2003; I was never enjoying it. I only eat it for the nutrients.

telcoM posted:

(As others have already said,) RedHat/CentOS packages Apache as "httpd", mainly because "RedHat always did it that way".

httpd is the actual name of the piece of software (also: Apache HTTP Server), originally based on NSCA httpd. It's the software published by the Apache HTTP Server Project, which is one of the main projects of the Apache Software Foundation. It is released under the Apache License.

It should be plain why "apache" is an inappropriate moniker. I mean, "Apache" is understood enough in colloquial usage, but nobody does pedantry like Linux standards-setters.

# ? Sep 5, 2014 01:49

minato: Jun 7, 2004; cutty cain't hang, say 7-up.; Taco Defender

Misogynist posted:

but nobody does pedantry like Linux standards-setters.

Uhhh, I think you mean GNU/Linux?

:rms2:

# ? Sep 5, 2014 02:16

Vulture Culture: Jul 14, 2003; I was never enjoying it. I only eat it for the nutrients.

minato posted:

Uhhh, I think you mean GNU/Linux?

Is GNU/Linux really an appropriate moniker? My system has software licens̵͚͓̗͇̙͎e̴͖̥͍̳d ̩u̥͖n̵̫̯̳͔d̮͞e̫͡r͏͓̹̪͖̝͔̪ ̙͖M̲͎͔̖I͈̖̗T̥̜̀, A͎̯̥͖͠p̟̝̩ͅaͅc͕̘̟̫͎͡h͙͉͙̩̥̠͜e̢̹͙̞̱̰̻̹,̺̘ͅ ̹B̡S̢̙̹̲̼D͍͇̙͠ͅ,̛̝̬̩͕ ͕̘̩́M͍̹̺̝̪̪̯ơ͍̻͔̪̺̼̤z̬͢il̞̪̥̫͙̗l̙̼̟͚͠a͔̪͈̮̣̕,͓̖̹̬͚ ̳̞̣̬O̭͖̪̠̰̰̹͝p̧̘̀͝e͜͏̼̘͟n̴̶̠̣͓̰̫͞S̸͏͖̟̣͍̣̺S͏̴̣͓̻̕L̩͓͔͔̟̻͓,̸̧̯͈ ̶̨̙̦̦̱͙̘̥̪W̷͓̥͖̬̦͎T̖̼̠F͔̙͓P̱̞͔L̩͍̬̜̪̻̦͘͞,͇̻̠̤̀ ̢̭̝͠a͖͕͙̖̦̬n̪͞d͇̕ ́͏͇ţ̬͎h̳͎̮̮͚͚̮̠͜ͅe̷̮̯̲̼̝̲̟̰͘ ͓̤̜͚̩͡A҉̻͎̲͜r̖͔̥̝t͕̣̞͘i̴̱͍̳͉͔̳͓s̢̧̱͓͉͎͉̞ṱ̸̛͍̻ͅi̯̣͎̕c͖̬̜̣̘̫͜ ̬̰̤̦͔̣͍̤͓̀́Ḷ͔̣̭̝̜̀i̢̜̥̹̪͙̙̕c̭͕̺̪͍̣͕e̤̮̻͙͉̪̕ͅn҉͝͏̳̤̣̺̜̝s̥̟̻͚͕ͅe̬̘,̷̷̷͓̰̱͕̮̥̤ ̶̢͇̮̭̣̜̻̹͠a̫͍̮̝̣̝n̴̗͈̫̦͍͖̻ͅd̥̻͔̱̻̬̠ I̴ͣͮ͏ ̛͐͑͋̋͆̅̆̃͊͠d̸̓̊̉͗ͯͤ̀͜ô̡̓͌͂̃ͭ͠nͬ̊ͫ̈̑́̑̌́͟͞҉'̅̔́̂̒ͧ͊ͥ͏́͡t͌̆̏̈́̋̈́ͧ ̍̽̄ͨt̵̡͂͐̇̔ḩ̷ͥͭͤ̕ï͠n̸ͨ͌ͭ̈̎͂ķ̔̓ͤ̽̓̔ ̈́̑̆͏ī̌ͪ̉́͂ͯť͑̓̔̀̊́'̊̐̒͟͜s̢ͥ͂̐ͭͭ̇͑̚ ̵ͫ̉̅͆ͫ̊̚fͮ̌ͭ̍ͬ̄͘a̒̒̊̍ͯ̊͡i̴̋͝͡r̄̍ͥͩ̏̓̓̈́͛ ̶̛̇̍̄ͨ̎ͧͤ͠t͗ͬ̎ͦ̏̕͢ȍ҉̷̢ ̴̛ͮ͂ͯ̂̈̀́s̨͋̿̑̋̑́̚̕ỉ̵n̨̔̆̓͋ͧg̓̽ͭl̢͂ͪ̄̓̿́ę̊̓͏͝ ̊̏̃̊ͣ͢oͥ̿̆̒ͭ̀͜͜ũͭ͐̊ͧͬ́̚͝t̛̃̈́ͬ͐ͧ͛ͫ̚͠ ͮ̔̒ͫ͛ͦ̕͜͠a̴̡̢ͥ͛̅ͮ̐ ̐͒ͪͤ̂̚͘͝p͆̿ą̾̇̉̆͛̂r̨͑̉̔̉ͧ̃͜t̓͟iͩ̏̿c̷ͦ͒ͣͫ͝ũ̡͐̚l̓͗̿͑ͨ͞a̵̡ͥȓ͒̅̈̉̒̀̚̕͡ ͭf̵̐̔̌ͩ̋̽̍͜o̸ͮ̃̇͟͡u̵ͭṅ̴́͛͒̆d̒̈͞͠aͬ̆̓t̸̉̒̏͑ͧ͊́͘i̒ͩ̅̃̔̿̒ͩ̇͢ö̸̧ͣͬ̅̓͐̊̀̋n̸̢̧ͯ͐͂ͭ ͬ̉ͬͪ̒̓̑͋͞t̀̽҉o̔̂̋͛̚҉̨ ̿̑̎͗̏t̽̏́͢͝͝h̵̔ͫ͋́ͤ͂̈͌ͦ͝͠eͤ̂ͬ̃̏̒͟ ͐̋̓͂͐ͮ̽́͐́͞e̔̈́̿̓̀̊͂̈͊̀͟x̵̵͑̍͛͒l̈́̇́̕

# ? Sep 5, 2014 05:19

Mr. Fix It: Oct 26, 2000; 💀ayyy💀

Misogynist posted:

Is GNU/Linux really an appropriate moniker? My system has software licens̵͚͓̗͇̙͎e̴͖̥͍̳d ̩u̥͖n̵̫̯̳͔d̮͞e̫͡r͏͓̹̪͖̝͔̪ ̙͖M̲͎͔̖I͈̖̗T̥̜̀, A͎̯̥͖͠p̟̝̩ͅaͅc͕̘̟̫͎͡h͙͉͙̩̥̠͜e̢̹͙̞̱̰̻̹,̺̘ͅ ̹B̡S̢̙̹̲̼D͍͇̙͠ͅ,̛̝̬̩͕ ͕̘̩́M͍̹̺̝̪̪̯ơ͍̻͔̪̺̼̤z̬͢il̞̪̥̫͙̗l̙̼̟͚͠a͔̪͈̮̣̕,͓̖̹̬͚ ̳̞̣̬O̭͖̪̠̰̰̹͝p̧̘̀͝e͜͏̼̘͟n̴̶̠̣͓̰̫͞S̸͏͖̟̣͍̣̺S͏̴̣͓̻̕L̩͓͔͔̟̻͓,̸̧̯͈ ̶̨̙̦̦̱͙̘̥̪W̷͓̥͖̬̦͎T̖̼̠F͔̙͓P̱̞͔L̩͍̬̜̪̻̦͘͞,͇̻̠̤̀ ̢̭̝͠a͖͕͙̖̦̬n̪͞d͇̕ ́͏͇ţ̬͎h̳͎̮̮͚͚̮̠͜ͅe̷̮̯̲̼̝̲̟̰͘ ͓̤̜͚̩͡A҉̻͎̲͜r̖͔̥̝t͕̣̞͘i̴̱͍̳͉͔̳͓s̢̧̱͓͉͎͉̞ṱ̸̛͍̻ͅi̯̣͎̕c͖̬̜̣̘̫͜ ̬̰̤̦͔̣͍̤͓̀́Ḷ͔̣̭̝̜̀i̢̜̥̹̪͙̙̕c̭͕̺̪͍̣͕e̤̮̻͙͉̪̕ͅn҉͝͏̳̤̣̺̜̝s̥̟̻͚͕ͅe̬̘,̷̷̷͓̰̱͕̮̥̤ ̶̢͇̮̭̣̜̻̹͠a̫͍̮̝̣̝n̴̗͈̫̦͍͖̻ͅd̥̻͔̱̻̬̠ I̴ͣͮ͏ ̛͐͑͋̋͆̅̆̃͊͠d̸̓̊̉͗ͯͤ̀͜ô̡̓͌͂̃ͭ͠nͬ̊ͫ̈̑́̑̌́͟͞҉'̅̔́̂̒ͧ͊ͥ͏́͡t͌̆̏̈́̋̈́ͧ ̍̽̄ͨt̵̡͂͐̇̔ḩ̷ͥͭͤ̕ï͠n̸ͨ͌ͭ̈̎͂ķ̔̓ͤ̽̓̔ ̈́̑̆͏ī̌ͪ̉́͂ͯť͑̓̔̀̊́'̊̐̒͟͜s̢ͥ͂̐ͭͭ̇͑̚ ̵ͫ̉̅͆ͫ̊̚fͮ̌ͭ̍ͬ̄͘a̒̒̊̍ͯ̊͡i̴̋͝͡r̄̍ͥͩ̏̓̓̈́͛ ̶̛̇̍̄ͨ̎ͧͤ͠t͗ͬ̎ͦ̏̕͢ȍ҉̷̢ ̴̛ͮ͂ͯ̂̈̀́s̨͋̿̑̋̑́̚̕ỉ̵n̨̔̆̓͋ͧg̓̽ͭl̢͂ͪ̄̓̿́ę̊̓͏͝ ̊̏̃̊ͣ͢oͥ̿̆̒ͭ̀͜͜ũͭ͐̊ͧͬ́̚͝t̛̃̈́ͬ͐ͧ͛ͫ̚͠ ͮ̔̒ͫ͛ͦ̕͜͠a̴̡̢ͥ͛̅ͮ̐ ̐͒ͪͤ̂̚͘͝p͆̿ą̾̇̉̆͛̂r̨͑̉̔̉ͧ̃͜t̓͟iͩ̏̿c̷ͦ͒ͣͫ͝ũ̡͐̚l̓͗̿͑ͨ͞a̵̡ͥȓ͒̅̈̉̒̀̚̕͡ ͭf̵̐̔̌ͩ̋̽̍͜o̸ͮ̃̇͟͡u̵ͭṅ̴́͛͒̆d̒̈͞͠aͬ̆̓t̸̉̒̏͑ͧ͊́͘i̒ͩ̅̃̔̿̒ͩ̇͢ö̸̧ͣͬ̅̓͐̊̀̋n̸̢̧ͯ͐͂ͭ ͬ̉ͬͪ̒̓̑͋͞t̀̽҉o̔̂̋͛̚҉̨ ̿̑̎͗̏t̽̏́͢͝͝h̵̔ͫ͋́ͤ͂̈͌ͦ͝͠eͤ̂ͬ̃̏̒͟ ͐̋̓͂͐ͮ̽́͐́͞e̔̈́̿̓̀̊͂̈͊̀͟x̵̵͑̍͛͒l̈́̇́̕

Mods, please do the needful and rename the thread to "The GNU/MIT/Apache/BSD/Mozilla/OpenSSL/vim/Linux Questions Thread, CC BY-NC-SA"

# ? Sep 5, 2014 08:52

Sulla Faex: May 14, 2010; No man ever did me so much good, or enemy so much harm, but I repaid him with ENDLESS SHITPOSTING

Misogynist posted:

Is GNU/Linux really an appropriate moniker? My system has software licens̵͚͓̗͇̙͎e̴͖̥͍̳d ̩u̥͖n̵̫̯̳͔d̮͞e̫͡r͏͓̹̪͖̝͔̪ ̙͖M̲͎͔̖I͈̖̗T̥̜̀, A͎̯̥͖͠p̟̝̩ͅaͅc͕̘̟̫͎͡h͙͉͙̩̥̠͜e̢̹͙̞̱̰̻̹,̺̘ͅ ̹B̡S̢̙̹̲̼D͍͇̙͠ͅ,̛̝̬̩͕ ͕̘̩́M͍̹̺̝̪̪̯ơ͍̻͔̪̺̼̤z̬͢il̞̪̥̫͙̗l̙̼̟͚͠a͔̪͈̮̣̕,͓̖̹̬͚ ̳̞̣̬O̭͖̪̠̰̰̹͝p̧̘̀͝e͜͏̼̘͟n̴̶̠̣͓̰̫͞S̸͏͖̟̣͍̣̺S͏̴̣͓̻̕L̩͓͔͔̟̻͓,̸̧̯͈ ̶̨̙̦̦̱͙̘̥̪W̷͓̥͖̬̦͎T̖̼̠F͔̙͓P̱̞͔L̩͍̬̜̪̻̦͘͞,͇̻̠̤̀ ̢̭̝͠a͖͕͙̖̦̬n̪͞d͇̕ ́͏͇ţ̬͎h̳͎̮̮͚͚̮̠͜ͅe̷̮̯̲̼̝̲̟̰͘ ͓̤̜͚̩͡A҉̻͎̲͜r̖͔̥̝t͕̣̞͘i̴̱͍̳͉͔̳͓s̢̧̱͓͉͎͉̞ṱ̸̛͍̻ͅi̯̣͎̕c͖̬̜̣̘̫͜ ̬̰̤̦͔̣͍̤͓̀́Ḷ͔̣̭̝̜̀i̢̜̥̹̪͙̙̕c̭͕̺̪͍̣͕e̤̮̻͙͉̪̕ͅn҉͝͏̳̤̣̺̜̝s̥̟̻͚͕ͅe̬̘,̷̷̷͓̰̱͕̮̥̤ ̶̢͇̮̭̣̜̻̹͠a̫͍̮̝̣̝n̴̗͈̫̦͍͖̻ͅd̥̻͔̱̻̬̠ I̴ͣͮ͏ ̛͐͑͋̋͆̅̆̃͊͠d̸̓̊̉͗ͯͤ̀͜ô̡̓͌͂̃ͭ͠nͬ̊ͫ̈̑́̑̌́͟͞҉'̅̔́̂̒ͧ͊ͥ͏́͡t͌̆̏̈́̋̈́ͧ ̍̽̄ͨt̵̡͂͐̇̔ḩ̷ͥͭͤ̕ï͠n̸ͨ͌ͭ̈̎͂ķ̔̓ͤ̽̓̔ ̈́̑̆͏ī̌ͪ̉́͂ͯť͑̓̔̀̊́'̊̐̒͟͜s̢ͥ͂̐ͭͭ̇͑̚ ̵ͫ̉̅͆ͫ̊̚fͮ̌ͭ̍ͬ̄͘a̒̒̊̍ͯ̊͡i̴̋͝͡r̄̍ͥͩ̏̓̓̈́͛ ̶̛̇̍̄ͨ̎ͧͤ͠t͗ͬ̎ͦ̏̕͢ȍ҉̷̢ ̴̛ͮ͂ͯ̂̈̀́s̨͋̿̑̋̑́̚̕ỉ̵n̨̔̆̓͋ͧg̓̽ͭl̢͂ͪ̄̓̿́ę̊̓͏͝ ̊̏̃̊ͣ͢oͥ̿̆̒ͭ̀͜͜ũͭ͐̊ͧͬ́̚͝t̛̃̈́ͬ͐ͧ͛ͫ̚͠ ͮ̔̒ͫ͛ͦ̕͜͠a̴̡̢ͥ͛̅ͮ̐ ̐͒ͪͤ̂̚͘͝p͆̿ą̾̇̉̆͛̂r̨͑̉̔̉ͧ̃͜t̓͟iͩ̏̿c̷ͦ͒ͣͫ͝ũ̡͐̚l̓͗̿͑ͨ͞a̵̡ͥȓ͒̅̈̉̒̀̚̕͡ ͭf̵̐̔̌ͩ̋̽̍͜o̸ͮ̃̇͟͡u̵ͭṅ̴́͛͒̆d̒̈͞͠aͬ̆̓t̸̉̒̏͑ͧ͊́͘i̒ͩ̅̃̔̿̒ͩ̇͢ö̸̧ͣͬ̅̓͐̊̀̋n̸̢̧ͯ͐͂ͭ ͬ̉ͬͪ̒̓̑͋͞t̀̽҉o̔̂̋͛̚҉̨ ̿̑̎͗̏t̽̏́͢͝͝h̵̔ͫ͋́ͤ͂̈͌ͦ͝͠eͤ̂ͬ̃̏̒͟ ͐̋̓͂͐ͮ̽́͐́͞e̔̈́̿̓̀̊͂̈͊̀͟x̵̵͑̍͛͒l̈́̇́̕

"hi is this the number for the tech support geeks? listen you need to get over here right now, my computer has a virus. all the stuff is wrong. i opened up the main part, not the computer part with the virus but the bigger part with all the wires and i rinsed that out but its still got a virus. im going to need you to come in here and replace my computer immediately with a macbook xbox. i cant do any work all. anyway im heading home for the weekend so just replace it while im gone and i'll be back on monday."

only burger king doesnt check its voicemails

# ? Sep 5, 2014 10:07

Experto Crede: Aug 19, 2008; Keep on Truckin'

Any recommendations for a DM which is designed mainly for use through keyboard?

# ? Sep 6, 2014 14:36

Suspicious Dish: Sep 24, 2011; 2020 is the year of linux on the desktop, bro; Fun Shoe

Experto Crede posted:

Any recommendations for a DM which is designed mainly for use through keyboard?

i3 is really good

# ? Sep 6, 2014 15:26

Quixzlizx: Jan 7, 2007

I'm not sure whether this is the correct thread, but I just installed Ubuntu + XFCE through Crouton on an Acer C720 Chromebook. There are a couple of issues where google hasn't been entirely helpful.

1. I want to be able to access SMB shares on the other computers on my network. Googling SMB gives me vague replies, though, since I have no need to install SAMBA server (or do I?) I don't want to create a share on the Chromebook; I just want access to existing SMB shares on other computers. There's a "Windows Network" icon in the file explorer, but I just get a "Failed to retrieve share list" error when I click on it.

2. In ChromeOS, two-finger click is a right-click equivalent, but this behavior doesn't do anything in XFCE. There doesn't appear to be a RMB behavior option in XFCE's GUI settings.

3. XFCE has this really annoying design choice where the grab tool in scrollbars doesn't fill the entire width of the scrollbar area, which means I can't just whip the mouse cursor against the edge of the screen to grab it. I found something on google about changing my widget theme to LXDesign, but then I couldn't find any information about widget themes and how to change them.

4. In XFCE, if you enable grouping instances of a program in the taskbar, you can no longer drag and drop those grouped programs. They stick to the left, and I can't drag anything in front of them. Is there any way to change this behavior?

And for software recommendations, is there a good CDisplay equivalent for reading comics/manga?

Thanks for any help.

Edit: It's Ubuntu 14.04

Quixzlizx fucked around with this message at 19:40 on Sep 6, 2014

# ? Sep 6, 2014 19:29

mod sassinator: Dec 13, 2006; I came here to Kick Ass and Chew Bubblegum,
and I'm All out of Ass

Quixzlizx posted:

I'm not sure whether this is the correct thread, but I just installed Ubuntu + XFCE through Crouton on an Acer C720 Chromebook. There are a couple of issues where google hasn't been entirely helpful.

1. I want to be able to access SMB shares on the other computers on my network. Googling SMB gives me vague replies, though, since I have no need to install SAMBA server (or do I?) I don't want to create a share on the Chromebook; I just want access to existing SMB shares on other computers. There's a "Windows Network" icon in the file explorer, but I just get a "Failed to retrieve share list" error when I click on it.

2. In ChromeOS, two-finger click is a right-click equivalent, but this behavior doesn't do anything in XFCE. There doesn't appear to be a RMB behavior option in XFCE's GUI settings.

3. XFCE has this really annoying design choice where the grab tool in scrollbars doesn't fill the entire width of the scrollbar area, which means I can't just whip the mouse cursor against the edge of the screen to grab it. I found something on google about changing my widget theme to LXDesign, but then I couldn't find any information about widget themes and how to change them.

4. In XFCE, if you enable grouping instances of a program in the taskbar, you can no longer drag and drop those grouped programs. They stick to the left, and I can't drag anything in front of them. Is there any way to change this behavior?

And for software recommendations, is there a good CDisplay equivalent for reading comics/manga?

Thanks for any help.

Edit: It's Ubuntu 14.04

I don't think SMB shares are supported on crouton. I have it setup on my C720 with just normal desktop Ubuntu and it doesn't work either. From what I understand the host ChromeOS kernel has to support it and right now it doesn't. Your best bet is SSHFS if you can make it work with your file share machine.

# ? Sep 6, 2014 19:55

Maluco Marinero: Jan 18, 2001; Damn that's a
fine elephant.

Suspicious Dish posted:

i3 is really good

Having tried a bunch of WMs I can echo this. Rock solid, its multi-monitor model is great, and config is straightforward.

# ? Sep 6, 2014 23:47

Longinus00: Dec 29, 2005; Ur-Quan

mod sassinator posted:

I don't think SMB shares are supported on crouton. I have it setup on my C720 with just normal desktop Ubuntu and it doesn't work either. From what I understand the host ChromeOS kernel has to support it and right now it doesn't. Your best bet is SSHFS if you can make it work with your file share machine.

Does smbnetfs work? Not as simple as using the GUI perhaps.

# ? Sep 6, 2014 23:50

reading: Jul 27, 2013

I got back home from a trip and fired up my dual boot Xubuntu/Win7 machine into the linux side, and installed the ~400mb of updates it requested. I used the system for a few hours and everything worked great. Then I tried to use it after a reboot, and it just goes to a blank dark monitor and stays there. I can boot into Windows just fine, and I can boot linux in recovery mode for an older kernel ok although everything is ultra slow and my other monitor is apparently disabled.

How can I figure out what went wrong and restore things? Something in the update has apparently busted it. I didn't see anything immediately obvious when I looked at the logs but I am not sure what to look for anyway.

# ? Sep 7, 2014 14:52

SurgicalOntologist: Jun 17, 2004

Quixzlizx posted:

I'm not sure whether this is the correct thread, but I just installed Ubuntu + XFCE through Crouton on an Acer C720 Chromebook. There are a couple of issues where google hasn't been entirely helpful.

1. I want to be able to access SMB shares on the other computers on my network. Googling SMB gives me vague replies, though, since I have no need to install SAMBA server (or do I?) I don't want to create a share on the Chromebook; I just want access to existing SMB shares on other computers. There's a "Windows Network" icon in the file explorer, but I just get a "Failed to retrieve share list" error when I click on it.

2. In ChromeOS, two-finger click is a right-click equivalent, but this behavior doesn't do anything in XFCE. There doesn't appear to be a RMB behavior option in XFCE's GUI settings.

3. XFCE has this really annoying design choice where the grab tool in scrollbars doesn't fill the entire width of the scrollbar area, which means I can't just whip the mouse cursor against the edge of the screen to grab it. I found something on google about changing my widget theme to LXDesign, but then I couldn't find any information about widget themes and how to change them.

4. In XFCE, if you enable grouping instances of a program in the taskbar, you can no longer drag and drop those grouped programs. They stick to the left, and I can't drag anything in front of them. Is there any way to change this behavior?

And for software recommendations, is there a good CDisplay equivalent for reading comics/manga?

Thanks for any help.

Edit: It's Ubuntu 14.04

Did you try this: https://github.com/dnschneid/crouton/wiki/How-to-mount-network-shares-on-Chromebook-using-smbnetfs

Also, the C720 could easily run something more heavyweight than XFCE, I use Gnome on my C700 and it's smooth. I've used Unity in the past as well. The double-tap right-click works for me, so my only possible suggestion would be to try a different desktop environment.

# ? Sep 7, 2014 15:52

evol262: Nov 30, 2010; #!/usr/bin/perl

reading posted:

I got back home from a trip and fired up my dual boot Xubuntu/Win7 machine into the linux side, and installed the ~400mb of updates it requested. I used the system for a few hours and everything worked great. Then I tried to use it after a reboot, and it just goes to a blank dark monitor and stays there. I can boot into Windows just fine, and I can boot linux in recovery mode for an older kernel ok although everything is ultra slow and my other monitor is apparently disabled.

How can I figure out what went wrong and restore things? Something in the update has apparently busted it. I didn't see anything immediately obvious when I looked at the logs but I am not sure what to look for anyway.

What DE? What hardware? It sounds like there was an updated kernel without a corresponding update to the binary blob for your GPU and dkms isn't working for some reason.

Tried booting with "nosplash verbose"?

# ? Sep 7, 2014 16:00

Thermopyle: Jul 1, 2003; ...the stupid are cocksure while the intelligent are full of doubt. �Bertrand Russell

Why is it that on this decently fast machine running Ubuntu 14.04 tab-completion of the service name when doing something like

code:

sudo service transm

can take like 5 or more seconds to complete to

code:

sudo service transsmission-daemon

?

I've actually had this problem on Ubuntu for years, and it's not the end of the world as I rarely need to control services. I'm mostly just curious.

# ? Sep 7, 2014 16:21

Bob Morales: Aug 18, 2006; ~~Just wear the fucking mask, Bob~~

I don't care how many people I probably infected with COVID-19 while refusing to wear a mask, my comfort is far more important than the health and safety of everyone around me!

Thermopyle posted:

I've actually had this problem on Ubuntu for years, and it's not the end of the world as I rarely need to control services. I'm mostly just curious.

Copy-pasta from Unix SE:

quote:

I don't know about fixing � there are all kinds of things that could go cause delays. But I can offer a few tips to investigate.

Just as a guess, maybe there's a directory somewhere in a search path ($PATH, or some place where bash looks for completion data) that's on a filesystem which is slow to respond. Usually it's remote filesystems that are slow, but it could also be a failing hard disk, a hung FUSE driver, etc.

The first step to investigate is to run set -x to get a trace of the commands that the shell executes to generate the completions. Watch where it pauses.

If that doesn't give enough information, bring in the big guns. Note the shell's process ID (echo $$). In another terminal, run strace -f -s9999 -p$$ (or the equivalent of strace if running on another unix flavor). Strace lists the system calls performed by the process. See if it seems to be accessing files that it shouldn't, or if access to some files is slow. Adding the option -T to the strace command line makes it show the time spent in each system call.

# ? Sep 7, 2014 17:29

reading: Jul 27, 2013

evol262 posted:

What DE? What hardware? It sounds like there was an updated kernel without a corresponding update to the binary blob for your GPU and dkms isn't working for some reason.

Tried booting with "nosplash verbose"?

Is DE distribution environment? The kernel is 3.11.0-17. The one I can roll back to that works in recovery mode is kernel 3.8.0-35.

Hardware:
NVIDIA GeForce GTX 760
Intel i7-3770 quadcore 3.4GHz
Acer P243W Monitor and an old Sony monitor which is the one that works during recovery mode. The Acer only works right now under Win7, Linux can't seem to use it. It's on a HDMI connection to the video card (or whatever the plug is that is white, rectangular, not an RS cable).

I looked more closely at my monitor and it has a dark flickering, like colorful static but extremely dark. I checked the video drivers and it's using the Nvidia proprietary drivers, not the noveau driver which has caused issues in the past.

# ? Sep 7, 2014 17:56

spankmeister: Jun 15, 2008

Desktop Environment (i.e. Gnome, KDE, XFCE, Unity etc...)

# ? Sep 7, 2014 18:01

evol262: Nov 30, 2010; #!/usr/bin/perl

Bob Morales posted:

Copy-pasta from Unix SE:

bash-completion generally sucks. I'm pretty sure Debian's bash-completion for services relies on /etc/init.d, so it's probably iterating through that, and potentially reading every file there (some of which are probably symlinks from upstart) to figure out what arguments it accepts. Strace isn't a bad idea. Not relying on bash-completion is a better idea.

reading posted:

Is DE distribution environment? The kernel is 3.11.0-17. The one I can roll back to that works in recovery mode is kernel 3.8.0-35.

Hardware:
NVIDIA GeForce GTX 760
Intel i7-3770 quadcore 3.4GHz
Acer P243W Monitor and an old Sony monitor which is the one that works during recovery mode. The Acer only works right now under Win7, Linux can't seem to use it. It's on a HDMI connection to the video card (or whatever the plug is that is white, rectangular, not an RS cable).

I looked more closely at my monitor and it has a dark flickering, like colorful static but extremely dark. I checked the video drivers and it's using the Nvidia proprietary drivers, not the noveau driver which has caused issues in the past.

So, in recovery mode, are the nvidia drivers loaded? Check lsmod.

I have no idea what you're talking about with a "RS cable". The inputs/outputs on the card don't really matter for now.

The dark flickering also doesn't matter. Boot with "nosplash debug" (or "nosplash verbose", I don't know what Ubuntu uses) by editing Grub and see what it's actually doing.

# ? Sep 7, 2014 18:13

reading: Jul 27, 2013

evol262 posted:

So, in recovery mode, are the nvidia drivers loaded? Check lsmod.

I have no idea what you're talking about with a "RS cable". The inputs/outputs on the card don't really matter for now.

The dark flickering also doesn't matter. Boot with "nosplash debug" (or "nosplash verbose", I don't know what Ubuntu uses) by editing Grub and see what it's actually doing.

I believe the graphics drivers are loaded according to lsmod.

I changed the grub startup to "nosplash debug" but that doesn't seem to have changed anything. What should it do? Is there a verbose log somewhere?

# ? Sep 7, 2014 22:50

evol262: Nov 30, 2010; #!/usr/bin/perl

reading posted:

I believe the graphics drivers are loaded according to lsmod.

I changed the grub startup to "nosplash debug" but that doesn't seem to have changed anything. What should it do? Is there a verbose log somewhere?

There's always a driver. Nvidia's binary driver is nvidia, so:

lsmod | grep nvidia

Should show something.

"nosplash debug" should disable plymouth and show actual output. If it isn't, it's an even better indication that something is badly off (like you blacklisted nouveau and don't have working nvidia drivers). If you don't see that, try adding "nosplash debug nomodeset"

# ? Sep 8, 2014 01:23

Suspicious Dish: Sep 24, 2011; 2020 is the year of linux on the desktop, bro; Fun Shoe

Thermopyle posted:

Why is it that on this decently fast machine running Ubuntu 14.04 tab-completion of the service name when doing something like
code:
sudo service transm
can take like 5 or more seconds to complete to
code:
sudo service transsmission-daemon
?

I've actually had this problem on Ubuntu for years, and it's not the end of the world as I rarely need to control services. I'm mostly just curious.

You underestimate the stupidity of bash and shell scripting

# ? Sep 8, 2014 02:49

Experto Crede: Aug 19, 2008; Keep on Truckin'

In the Ubuntu thread OP it says that mint has been breaking things compared to Ubuntu recently. Can someone explain what that means exactly? As far as I can tell mint is just still Ubuntu with extra repos and a different default DE.

Thought I'd ask here as it's not strictly Ubuntu related.

# ? Sep 8, 2014 03:17

Quixzlizx: Jan 7, 2007

SurgicalOntologist posted:

Did you try this: https://github.com/dnschneid/crouton/wiki/How-to-mount-network-shares-on-Chromebook-using-smbnetfs

Also, the C720 could easily run something more heavyweight than XFCE, I use Gnome on my C700 and it's smooth. I've used Unity in the past as well. The double-tap right-click works for me, so my only possible suggestion would be to try a different desktop environment.

This seems like it is to view the shares in ChromeOS? Or can I just skip all of the steps after 12 if I only care about accessing the shares from the chroot?

I'm also not quite sure what it is asking for at this step:

code:

Add hosts and authentications data in smbnetfs configuration file
    auth "user" "password"
    host host1 visible=true
    host host2 visible=true

I kind of wanted to try going basic with the DE, but some of these design decisions are pretty infuriating. It has nothing to do with how lightweight it is, but just how the developers decided to implement the GUI.

# ? Sep 8, 2014 04:07

SurgicalOntologist: Jun 17, 2004

Quixzlizx posted:

This seems like it is to view the shares in ChromeOS? Or can I just skip all of the steps after 12 if I only care about accessing the shares from the chroot?

I'm also not quite sure what it is asking for at this step:
code:
Add hosts and authentications data in smbnetfs configuration file
    auth "user" "password"
    host host1 visible=true
    host host2 visible=true 
I kind of wanted to try going basic with the DE, but some of these design decisions are pretty infuriating. It has nothing to do with how lightweight it is, but just how the developers decided to implement the GUI.

Yes you can probably skip everything after 12.

As for step 9, it's telling you what text to put into the file you created in step 8. You can search smbnetfs.conf for more details. For example I found this: http://unsinn.wikispaces.com/file/view/smbnetfs.conf

# ? Sep 8, 2014 07:11

telcoM: Mar 21, 2009; Fallen Rib

reading posted:

I changed the grub startup to "nosplash debug" but that doesn't seem to have changed anything. What should it do? Is there a verbose log somewhere?

Since your problem seems to be X-related, I would at least take a look at the X server logs.
They are typically located at /var/log/Xorg.N.log, where N is a X display number (usually 0).

At least on Debian, this log is rotated each time the system boots up into graphics mode, so you might want to see if there's an older version of the log around. If there is just one, it will probably be named /var/log/Xorg.N.log.old; if there are several, there will probably be some sort of numbering scheme.

At the beginning of the log file, the X server will be describing its hardware detection procedure.
Each log message will have two letters inside parentheses at the beginning: they are described near the beginning of the log.

code:

[    13.778] Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.

As you're using the nvidia binary driver, you should see a block similar to this:

code:

[    13.923] (II) LoadModule: "nvidia"
[    13.923] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[    13.930] (II) Module nvidia: vendor="NVIDIA Corporation"
[    13.930]    compiled for 4.0.2, module version = 1.0.0
[    13.930]    Module class: X.Org Video Driver
[    13.931] (II) NVIDIA dlloader X Driver  340.32  Tue Aug  5 20:13:04 PDT 2014
[    13.931] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs

If there is a problem with the nvidia driver, there should be some errors shortly after that.

If the "nouveau_drv.so", "vesa_drv.so" or "fbdev_drv.so" is loaded instead, then you're falling back to either the reverse-engineered open-source driver (nouveau) or generic non-accelerated driver (vesa and fbdev), so things are going to be super slow.

The nvidia binary driver includes ready-made kernel modules only for kernels that existed when that particular driver version was released (obviously). If the kernel is updated to a newer version without respectively updating the driver, there is going to be a problem. However, the nvidia driver includes provisions to recompile the part of the kernel module that acts as an interface between the kernel and the actual driver code. The system that can do this automatically is called "DKMS".

For DKMS to successfully compile kernel modules, it needs to have some compile-time information from the target kernel version. In Debian, this is known as the "linux-headers" package; I guess Ubuntu might follow the same naming scheme. If you use the nvidia binary driver, you should make sure that you have the linux-headers package installed and _exactly the same version_ as your newest kernel.

If you don't have that package installed, install it now. Then run "sudo dkms status". If it mentions "nvidia", note the kernel version(s) listed on the line. To make DKMS retry the kernel module compilation after you've installed the linux-headers package, run "sudo dkms install nvidia/<driver-version> -k <your-newest-kernel-version>" (replacing <driver-version> and <your-newest-kernel-version> as appropriate; look at "sudo dkms status" to see the expected format for those.

If "sudo dkms status" does not work, your nvidia driver is installed without using the DKMS system. In that case, I will need more information before suggesting a possible fix. Perhaps someone else with an Ubuntu system might know the exact details?

# ? Sep 8, 2014 08:54

spankmeister: Jun 15, 2008

On ubuntu you want to use "linux-headers-generic" (if you use the default "generic" kernel) because it's a meta package that updates together with your kernel.

# ? Sep 8, 2014 10:26

Prince John: Jun 20, 2006; Oh, poppycock! Female bandits?

spankmeister posted:

On ubuntu you want to use "linux-headers-generic" (if you use the default "generic" kernel) because it's a meta package that updates together with your kernel.

Sorry if this is stating the obvious, but doesn't Ubuntu leave previous kernels there to be accessed in the grub selection menu (i.e. your old kernel, modules etc aren't deleted just because you install a new one)? From memory, I don't think you have to select a recovery kernel, can't you just literally press the down arrow and select the kernel with a slightly lower number?

# ? Sep 8, 2014 13:42

spankmeister: Jun 15, 2008

Prince John posted:

Sorry if this is stating the obvious, but doesn't Ubuntu leave previous kernels there to be accessed in the grub selection menu (i.e. your old kernel, modules etc aren't deleted just because you install a new one)? From memory, I don't think you have to select a recovery kernel, can't you just literally press the down arrow and select the kernel with a slightly lower number?

Yeah but if you want to use dkms to dynamically compile kernel modules after a kernel upgrade you want to have the kernel headers for the new kernel. If you install a specific kernel header package for a specific version instead of the meta package then after a kernel upgrade dkms will fail to build the new modules because the kernel headers won't be there.

# ? Sep 8, 2014 14:08

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# ? May 9, 2024 23:17

Prince John: Jun 20, 2006; Oh, poppycock! Female bandits?

spankmeister posted:

Yeah but if you want to use dkms to dynamically compile kernel modules after a kernel upgrade you want to have the kernel headers for the new kernel. If you install a specific kernel header package for a specific version instead of the meta package then after a kernel upgrade dkms will fail to build the new modules because the kernel headers won't be there.

Sorry, let me try and clarify what I meant. The computer used to work fine, so there is already a kernel sat there, with appropriate modules compiled, just not being used.

The new version has problems, be that dkms, or some other issue. I'm sure when I've had problems with a particular kernel upgrade, I have just been able to select the previous kernel version at bootup, at which point the old modules etc would be loaded.

The OP seemed to describe only two options - using the new kernel (v3.11.xxx) (where the module building has failed), or using a much older recovery kernel (v3.8.xx).

I guess I was expecting three options - recovery kernel, new kernel and previously running kernel (i.e. 3.11.lower_point_release).

Prince John fucked around with this message at 14:54 on Sep 8, 2014

# ? Sep 8, 2014 14:51

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Linux Questions Thread: a bunch of pitfalls, but technically it's possible

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