Check if SSH still up, reconnect if not (run as a cron job)

check_ssh_tunnel.sh

#/bin/bash

DATE=$(date)

runAutossh() {
    /usr/bin/autossh -M 20000 -Nf -R PORT:127.0.0.1:PORT USER@REMOTE_IP
    if [[ $? -eq 0 ]]; then
        echo Tunnel to REMOTE_IP created successfully
    else
        echo An error occurred creating a tunnel
    fi
}
## Check if PORT can be reached.  If it returns non-zero, then create a new connection
/bin/nc -z -v -w5 REMOTE_IP PORT
if [[ $? -ne 0 ]]; then
    echo Creating new tunnel connection
    echo "Connection down: ${DATE} > Tunnel restart" >> /home/USER/tunnel_reconnect.log
    runAutossh
fi