# isitup ``` #!/bin/sh # Author: prx <prx@si3t.ch> # licence: MIT # Check if $1 is reachable on port $2 help() { echo "usage: $0 <domain or IP> <port>" exit 1 } test $# -eq 2 || help nc -zw1 "${1}" "${2}" if [ $? -ne 0 ]; then printf "Connection to %s port %s failed 😨\n" "$domain" "$port" exit 1 fi exit 0 ``` --- (DIR) /