One extremely common unix commandline thing I just absolutely don't get is these hundreds of cryptic character soup aliases for things like git.
Stuff like gcam for git commit --amend --message and gp for git push (or was that git pull?)
Especially when these are added by some plugin or framework and so you have a ton of barely-mnemonic commands that you didn't even add.
I just don't have the brainpower to remember these.