Open an SSH tunnel to a remote MySQL server

tunnel.sh

# Open an SSH tunnel to port 3306 (default MySQL port) on a remote machine.
# Specify the local port with an optional 2nd argument.
# The default is 3307, in case you have MySQL running locally on 3306.
#
# $ tunnel user@host
#     -> opens tunnel to host on port 3306, using local port 3307
#
# $ tunnel user@host 3333
#     -> opens tunnel to host on port 3306, using local port 3333

function tunnel {
    port=${2-3307}
    ssh $1 -L $port:localhost:3306
}