UNIX for Advanced & Expert Users

#! /bin/bash
#
# script to automate password reset
#
# declare variables
declare USERNAME="TEST" # This allows the username to be changed or multiple usernames specified by creating a new variable
declare TMP_VAR="" # Temporary variable we will use to store value of user check
#
echo "Start password reset script"
# first check to make sure user exists
TMP_VAR=`grep ^$USERNAME: /etc/passwd` > /dev/null > 2>&1
if [ "$TMP_VAR" = "" ];
then {
	echo "User $USERNAME does not exist"
	# exit cleanly with result code 1 (not successful)
	exit 1;
}
else {
# if username exists proceed to reset password
passwd --stdin $USERNAME < pass_file # pass_file is the file where the password is stored you want to use
}
fi
# exit cleanly and return 0 result code
exit 0;

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