sl
Not a command but bang expansions. For example !?
is the args of last command useful for stuff like mkdir foo ; cd !?
https://www.redhat.com/sysadmin/bash-bang-commands learn these. you suck at using your computer if you don’t know them.
control+R
in bash, it lets you quickly search for previously executed commands.
its very useful and makes things much quicker, i recommend you give it a try.
CTR + u will delete the whole command. I use that a lot so I don’t have to backspace. It’s saved me a ton of time