Write a shell script to check whether the named user is currently logged in or not.

File Name : ex16.sh

clear

echo "Enter user name : \c"

read unm

unm1=$(who | cut -d " " -f 1)

if [ "$unm" = "$unm1" ]

then

            echo " [ $unm ] is already Login"

else

            echo " [ $unm ] is not Login"

fi