example01.sh

#!/bin/bash

# Display what the user types on the command line.
echo "You executed the command : ${0}"

# Display the path and filename of the script.
echo "You used $(dirname ${0}) as the path to the $(basename ${0}) script"

# Tell them how many arguments they passed in.
NUMBER_OF_PARAMETERS="${#}"
echo "You supplied ${NUMBER_OF_PARAMETERS} argument(s) on the command line."  

# Make sure they at leasat supply one argument.
if [[ "${NUMBER_OF_PARAMETERS}" -lt 1 ]]
then
	echo "Usage: ${0} USER_NAME [USER_NAME]..."
	exit 1
fi

# Generate and display a password for each parameter
for USER_NAME in "${@}"
do
	PASSWORD=$(date +%s%N |sha256sum | head -c12)
	echo "${USER_NAME}: ${PASSWORD}"
done