write This script prompts user id and displays user login name, user name and home directory of the user

#!/bin/bash
#####################################################################
# file name:    sy_4
# Author :    Suresh Yadagiri
# date    :    August 10 2010
# Description:
#    This script prompts user id and
#     displays user login name, user name and home
#     directory of the user. if user id is not
#     found in /etc/passwd file then it displays
#     appropriate error message
#######################################################################

if [ $# -gt 0 ]
then
echo "No arguments expected"
echo "Usage: $0"
exit 1
fi

echo -e "Enter user id :\c"
read userid
userloginname=`grep ":$userid:" /etc/passwd | cut -f1 -d :`

#Display error message is userid is not found
if [ "$userloginname" == "" ]
then
echo "user id is not found. Account may be not  local account"
exit 1
fi
#display user information
#userloginname=`grep ":$userid:" /etc/passwd | cut -f1 -d :`
username=`grep ":$userid:" /etc/passwd | cut -f5 -d :`
homedirectory=`grep ":$userid:" /etc/passwd | cut -f6 -d :`

echo "user login name        :     $userloginname"
echo "user  name        :          $username"
echo "user Home directory     :       $homedirectory"