openport() {# sed = second line https://stackoverflow.com/a/1429628/152711# awk = second word https://unix.stackexchange.com/a/174038processId=$(lsof -i tcp:$1 | sed -n 2p | awk '{print $2}')if [ ! -z "$processId" ] # Non-null https://www.cyberciti.biz/faq/bash-shell-find-out-if-a-variable-has-null-value-or-not/thenecho Killing $processIdkill -9 $processIdelseecho No process foundfi}