You could also do a "up" for one up "upp" for 2 and "upppp" for 4 because of fun

Oh I really like this. I never had an alias for this since I need to do multiple backwards cds very rarely, but I might just copy this

I use Fish and have keybinds for previous and next directory, 99% of the time when going up in a directory it's to (one of) the previous directory/ies I was in

Holy shit

Look into zoxide.

z direc

Will take you to the most used directory starting with "direc" eg "/home/me/random/directory"

What I use to automatically extend stuff like ls .... to ls ../../../..

function expand-dots() {
    local MATCH
    if [[ $LBUFFER =~ '(^| )\.\.\.+' ]]; then
        LBUFFER=$LBUFFER:fs%\.\.\.%../..%
    fi
}

function expand-dots-then-expand-or-complete() {
    zle expand-dots
    zle expand-or-complete
}

function expand-dots-then-accept-line() {
    zle expand-dots
    zle accept-line
}

zle -N expand-dots
zle -N expand-dots-then-expand-or-complete
zle -N expand-dots-then-accept-line
bindkey '^I' expand-dots-then-expand-or-complete
bindkey '^M' expand-dots-then-accept-line

(for zsh)

How would you define "knowing" and "using" linux? Many people here don't use Linux professionally and only on the desktop, so they probably aren't too familiar with all the features of different cli programs.

Reading a blog post is more accessible than reading a man page. I didn't know cd -, so reading the post was worth it I'd say.