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What do i look for in logs (lemmy.stonansh.org)
submitted 1 year ago by lemmy@lemmy.stonansh.org to c/linux@lemmy.ml

Hi everyone

My proxmox server is crashing daily. And I've been checking the logs. But the thing is. What do I look for? Syslog, kern and daemonlogs. I would like to fix this problem. Need advice ! Thanks

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[-] HurlingDurling@lemm.ee 50 points 1 year ago

When I look a the logs, I'm mostly looking for as least knots as possible, but also to make sure they are cedar, pine, or oak depending on the project.

Oh shit, this isn't the carpentry community. NVM then

[-] couscouscivil@sh.itjust.works 6 points 1 year ago

lol!

Thanks, you are the reason I look at comments.

[-] lauha@lemmy.one 2 points 1 year ago* (last edited 1 year ago)

When I am reading the logs, I usually check who was the last seaman in charge when the ship crashed through the pier.

[-] Atemu@lemmy.ml 38 points 1 year ago

The picture made me lol :D

[-] mvirts@lemmy.world 33 points 1 year ago

If you know the times of the crash, check whatever is logged right before and after

[-] couscouscivil@sh.itjust.works 10 points 1 year ago* (last edited 1 year ago)

grep -Ri 'error/|warning' /var/log/

Then you can further pipe 'grep' or 'grep -v' based on what you see or for a specific time.

[-] badbytes@lemmy.world 10 points 1 year ago

On Linux systems running systems I usually use the journalctl tool to look at messages. Ex.

journalctl --list-boots journalctl --since="2012-10-30 18:17:16"

Looking for anything obvious.

[-] lemmy@lemmy.stonansh.org 3 points 1 year ago

I'm -to be honest- quite the noob. What is obvious?

[-] oldfart@lemm.ee 3 points 1 year ago

Anything looking like this: http://i.stack.imgur.com/RMcUY.jpg

Anything saying "error" or "fatal" in the kernel log.

It's quite likely that you will not find anything because the machine reboots before it can write to disk. In that case, I'd start with memtest86.

Protip: view the logs in vim, it highlights errors in red.

[-] lemmy@lemmy.stonansh.org 1 points 1 year ago

Alright. That is what i see on my screen.

[-] Penguincoder@beehaw.org 7 points 1 year ago

You know what the various logs are, that's good to help out. So you have any crash dumps enabled? I think on Debian (what promox is based on), you have to install kdump tools and reboot. Then it should cause a the kernel to log a dump file you can read with crash if it's a kernel crash and not something else.

[-] lemmy@lemmy.stonansh.org 1 points 1 year ago

Ok will do this. It chrashed again. And I need this thing up and running and keep running.

[-] Interstellar_1@pawb.social 6 points 1 year ago

I do this all the time when I look at logs, I don't even really know why

[-] mvirts@lemmy.world 3 points 1 year ago

Pill bugs, moss, snakes, etc.

[-] robinj1995@feddit.nl 2 points 1 year ago

A good place to start because it's a likely culprit is anything mentioning "OOM" (which refers to Out Of Memory)

this post was submitted on 09 Sep 2023
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