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’.
parallel, easy multithreading right in the command line
inotifywait, for seeing what files are being accessed/modified
tail -F, for a live feed of a log file
I can recommend tmux also as an alternative to screen
No, not at all. That is a terrible default. I do work a lot on number churning and sometimes I have to test stuff on my own machine. Generally I tend to use a safe number such as 10, or if I need to do something very heavy I’ll go to 1 less than the actual number of cores on the machine. I’ve been burned too many times by starting a calculation and then my machine stalls as that code is eating all CPU and all you can do is switch it off.