Some handy bash aliases / functions I don't see elsewhere often

bash_aliases.sh

# configure some commands via env variables
# (usually located in another file)
# export EDITOR=micro
# export VISUAL=$EDITOR
# export XEDITOR="geany"
# export BROWSER=xdg-open

# To open any file type via app registered in desktop system
alias xo='xdg-open'

# open default editor, optionally with given file
function ed() {
    if [[ -n "$DISPLAY" ]]; then
        ${XEDITOR:-gedit} "$@"
    else
        ${EDITOR:-nano} "$@"
    fi
}

# ls
alias ltr='ls -1tr'  # list last modified files at bottom (near prompt)
alias lltr='ls -ltr'

# file renaming
alias ftl="perl-rename -i 'tr/A-Z/a-z/'"  # "files to lowercase"

# dates
alias now='date +"%A, %d.%m.%Y, %H:%M Uhr"'
alias utc='date --utc +"%A, %d.%m.%Y, %H:%M Uhr"'
alias isonow='date +"%Y-%m-%dT%H:%M:%S%z"'
alias isoutc='date --utc +"%Y-%m-%dT%H:%M:%S%z"'
alias timenow='date +"%X"'
alias datenow='date +"%x"'
alias timeutc='date --utc +"%X"'
alias dateutc='date --utc +"%x"'

# Python
alias py='python'
alias py2='python2'
alias py3='python3'
alias ipy='ipython'
alias ipy2='ipython2'
alias ipy3='ipython3'
alias upy='micropython'

function pylib() {
    $BROWSER "https://docs.python.org/3/library/$1.html"
}

function pypi() {
    $BROWSER "https://pypi.org/project/$1/"
}

# pip
alias pipi="pip install"
alias pipu="pip install -U"
alias pipl="pip freeze | less"
alias pipg="pip freeze | grep -i"
alias piprm="pip uninstall"
alias pipir="pip install -r requirements.txt"

# Systemd
alias sdctl="sudo systemctl"
alias sdusr="systemctl --user"

# Arch package management
PACMAN="$(which pikaur 2>/dev/null)"
PACMAN="${PACMAN:-pacman}"
alias pinst='$PACMAN -S'
alias premove='$PACMAN -R'
alias pfind='$PACMAN -Ss'
alias pinfo='$PACMAN -Si'
alias pshow='$PACMAN -Si'
alias plist='$PACMAN -Ql'
alias pwhat='$PACMAN -Qo'
alias pwhich='$PACMAN -Qo'

# AUR
function aur() {
    $BROWSER "https://aur.archlinux.org/packages/?O=0&K=$1"
}

function aurclone() {
    git clone "ssh://aur@aur.archlinux.org/$1.git"
}