Fake 'ping' for TCP-only environments. Return exit 0 if target port 22 is available.

ping 22

#!/bin/sh

PORT=22
HOST="${BASH_ARGV[0]}"

echo -e Pinging $HOST on port $PORT over TCP

if nc -z -v -w5 $HOST $PORT >/dev/null 2>&1;
then
    echo "OK"
    exit 0
else
    echo "Connection failed"
    exit 1
fi