Probably the simplest pomodoro timer CLI for Linux
You don't have to install it. Just copy the following snippet in your .profile / .bashrc / .zshrc.
function pomo() {
arg1=$1
shift
args="$*"
min=${arg1:?Example: pomo 15 Take a break}
sec=$((min * 60))
msg="${args:?Example: pomo 15 Take a break}"
while true; do
date '+%H:%M' && sleep "${sec:?}" && notify-send -u critical -t 0 -a pomo "${msg:?}"
done
}pomo 15 Take a break