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’.
The watch command is very useful, for those who don’t know, it starts an automated loop with a default of two seconds and executes whatever commands you place after it.
It allows you to actively monitor systems without having to manually re-run your command.
So for instance, if you wanted to see all storage block devices and monitor what a new storage device shows up as when you plug it in, you could do:
And see in real time the drive mount. Technically not “real time” because the default refresh is 2 seconds, but you can specify shorter or longer intervals.
Obviously my example is kind of silly, but you can combine this with other commands or even whole bash scripts to do some cool stuff.
Ooooh cool, I think this explains how they have our raid monitor set up at work! I keep forgetting to poke through the script