this post was submitted on 16 Dec 2025
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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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[–] InFerNo@lemmy.ml 24 points 1 day ago* (last edited 1 day ago) (9 children)

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

[–] hades@feddit.uk 2 points 20 hours ago (2 children)
[–] InFerNo@lemmy.ml 1 points 18 hours ago (1 children)

I'm not sure what you mean. I gave 3 different commands..

[–] Pssk@lemmy.ml 2 points 17 hours ago

You can use M-. instead of $_ to insert last param of last command. You can also access older commands' param by repeated M-. just like you would do for inserting past commands with up arrow or C-p

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