Shortcut for making a reverse tunnel on `localhost:7777`

revtun.sh

#!/bin/bash
if [[ ! -z $1 ]]; then
  while getopts i:h:p: option
    do
        case "${option}" in
            i) identity=${OPTARG};;
            h) host=${OPTARG};;
            p) port=${OPTARG};;
        esac
    done
        ssh -i ~/.ssh/${identity} -p ${port} -N -D localhost:7777 ${host}  -vvv
else
    echo "Incorrect input, please try again."
fi