We don’t install netcat by default for security
https://listsprd.osu.edu/pipermail/ood-users/2018-October/000269.html
We added this function to our before script to validate the script:
port_used () {
local port="{1#*:}"
sleep 2
netstat -nap 2>/dev/null | grep -q "0.0.0.0:{port} "
}