How Do I Use Getopt?

Here's a simple example:

#!/bin/bash
# http://www.tutorialspoint.com/unix_commands/getopt.htm

usage()
{
  echo usage: $0 -- --ge0IP 10.132.56.250 --ge1IP 192.168.99.1
  exit 1
}

# read the options
TEMP=`getopt --long ge0IP:,ge1IP: -- "$@"`
eval set -- "$TEMP"

# extract options and their arguments into variables.
while true ; do
    case "$1" in
        --ge0IP)
            ge0IP=$2 ; shift 2 ;;
        --ge1IP)
            ge1IP=$2; shift 2 ;;
        --) shift; break ;;
        *) usage ;;
    esac
done
set | grep ^ge

The output is:

$ getoptions -- --ge0IP 10.132.56.250 --ge1IP 192.168.99.1
ge0IP=10
ge1IP=11