Unix Shell Program on Case Structure.

Program:

clear

echo " 1.contents of /etc/passwd"

echo " 2.no of users logged in"

echo " 3.presently working directory"

echo " 4.exit"

echo " select any of your choice"

read num

case $num in

1)

echo " contents of the file /etc/passwd"

cat /etc/passwd|pg

;;

2)

echo "no of users presently working"

u =` who | wc |cut -c 1-10 `

echo $u

;;

3)

echo "Your presently working directory is "

pwd

;;

4)

exit

Input/OutPut:

1.contents of /etc/passwd

2.no of users logged in

3.presently working directory

4.exit

select any of your choice