Question

Write a BASH script to create a user account.  The script should process two positional parameters: o First positional parameter is supposed to be a string with user name (e.g., user_name) o Second positional parameter is supposed to be a string with user password (e.g., user_password)  The script should be able to process one option (use getopts command): o Option -f arg_to_opt_f that will make your script direct all its output messages to file -arg_to_opt_f

Answer 1

#!/bin/bash

usage() {

       echo "Usage: $0 [ -f outfile ] name password" 1>&2

       exit 1

}

while getopts "f:" o; do

       case "${o}" in

       f)

               filename=${OPTARG}

           ;;

       *)

               usage

           ;;

   esac

done

shift $((OPTIND-1))

name=$1

password=$2

if [ -z "$password" ] ; then

       usage

fi

set -x

if [ -z "$filename" ] ; then

       useradd -p `crypt $password` $name

else

       useradd -p `crypt $password` $name > $filename

fi