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
For interactive editing, the keybind
alt+.inserts the last argument from the previous command. Using this instead of $_ has the potential to make your shell history a little more explicit. (vim $_isn’t as likely to work a few commands later, butvim actual_file.shmight)You can also press
alt+.multiple times to cycle through all recent argumentsI just press M-.
I’m not sure what you mean. I gave 3 different commands…
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
I really hope I remember this one long enough to make it a habit
I have my .bashrc print useful commands with a short explanation. This way I see them regularly when I start a new session. Once I use a command enough that I have it as part of my toolkit I remove it from the print.
That is really useful! Thanks for the tip!