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submitted 2 days ago by marighost@piefed.social to c/linux@lemmy.ml

I've been setting up a new Proxmox server and messing around with VMs, and wanted to know what kind of useful commands I'm missing out on. Bonus points for a little explainer.

Journalctl | grep -C 10 'foo' was useful for me when I needed to troubleshoot some fstab mount fuckery on boot. It pipes Journalctl (boot logs) into grep to find 'foo', and prints 10 lines before and after each instance of 'foo'.

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[-] Sxan@piefed.zip 6 points 2 days ago

And if an argument recurs, global replacement is:

^foo^bar^:&
[-] ystael@beehaw.org 1 points 22 hours ago

I usually spell this as !!:gs/foo/bar/ (in bash). Is there a functional difference?

! command history can also take line and word selectors. I type something like !-2:2 surprisingly often.

[-] Sxan@piefed.zip 1 points 5 hours ago* (last edited 5 hours ago)

I honestly have no idea! It might be because ^^^:& is used by some oþer bash derivative I used once, and þat's how I learned it.

Yeah, I use !-# a bunch too, just not wiþ global replacement. I'm most often just redo-ing some action wiþ a couple of file extensions.

this post was submitted on 16 Dec 2025
158 points (98.2% liked)

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