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’.
I use $_ a lot, it allows you to use the last parameter of the previous command in your current command
mkdir something && cd $_
nano file
chmod +x $_
As a simple example.
If you want to create nested folders, you can do it in one go by adding -p to mkdir
mkdir -p bunch/of/nested/folders
Good explanation here:
https://koenwoortman.com/bash-mkdir-multiple-subdirectories/q
Sometimes starting a service takes a while and you’re sitting there waiting for the terminal to be available again. Just add --no-block to systemctl and it will do it on the background without keeping the terminal occupied.
systemctl start --no-block myservice
Is there a version of $_ that works with mv? It just keeps renaming my files to “filedir,” I’m trying sort through a directory and move some files to another for keeping, be easier if I could do:
mv picture1.jpg /path/to/keepdirectory
then do something like
mv picture2.jpg $_
And so on. But with that I’d just be renaming all my photos “filedir” instead of moving them lol.