Straight Bash Space Separated Usage `./myscript.sh -e conf -s /etc -l /usr/lib /etc/hosts ` http://linuxgeeks.ru/bash-2.htm

cmd.sh

#!/bin/bash
while [[ $# > 1 ]]
do
key="$1"

case $key in
    -e|--extension)
    EXTENSION="$2"
    shift
    ;;
    -s|--searchpath)
    SEARCHPATH="$2"
    shift
    ;;
    -l|--lib)
    LIBPATH="$2"
    shift
    ;;
    --default)
    DEFAULT=YES
    shift
    ;;
    *)
            # unknown option
    ;;
esac
shift
done
echo FILE EXTENSION  = "${EXTENSION}"
echo SEARCH PATH     = "${SEARCHPATH}"
echo LIBRARY PATH    = "${LIBPATH}"
echo "Number files in SEARCH PATH with EXTENSION:" $(ls -1 "${SEARCHPATH}"/*."${EXTENSION}" | wc -l)
if [[ -n $1 ]]; then
    echo "Last line of file specified as non-opt/last argument:"
    tail -1 $1
fi