Shell Programming and Scripting

#!/bin/bash
#Filename: Assigntest Author: Luke Francis
quit=n
while [ "$quit" = "n" ]
do
clear
echo "OPERATOR ADMINISTRATIVE TOOL"
echo "1. User Information"
echo "2. Network Connectivity"
echo "3. Processes"
echo "4. System Information"
echo "5. Hardware Utilization"
echo "Q. Quit"
echo
echo "Which option do you require?"

read menunumber
case $menunumber in
1)clear
echo "USER INFORMATION"
 echo "1. Registered Users"
 echo "2. Disk Usage"
 echo "3. Last Logins"
 echo "4. Users Currently Logged In"
 echo "5. Total number of users"
 echo "Q. Quit"

echo "Which option do you require?"

read menunumber2
case $menunumber2 in

1)clear
echo "The users registered on the system are:"
echo
awk -F: '{print $1}' /etc/passwd
echo
echo "Hit the Enter Key to continue"
read junk;;

2)clear
echo "Disk Usage is as follows:"
echo
du
echo
echo "Hit Enter Key to continue"
read junk;;

3)clear
echo "Information on last noted login can be found next to each username."
echo
last
echo
echo "Hit Enter Key to continue"
read junk;;

4)clear
echo "Users currently logged in are:"
echo
 w
echo
echo "Hit Enter Key to continue"
read junk;;

5)clear
echo "The total number of users are:"
echo
 who -q
echo
echo "Hit Enter Key to continue"
read junk;;

Q|q)clear
echo "Are you sure you want to quit? Y/N"
read choice1
case $choice1 in
N|n)clear
echo "Hit Enter Key to continue"
read junk;;

Y|y)quit=y;;
*)clear
sleep 1
esac
esac
esac
done
clear
echo "Thank you for using the Operator Administrative Tool"

         Q|q)clear
           echo "Are you sure you want to quit? Y/N"
           read choice1
           case $choice1 in
              N|n)clear
                 echo "Hit Enter Key to continue"
                 read junk;;

              Y|y)quit=y;;
              *)clear
                sleep 1;;
           esac
         ;;
         esac
       ;;
        2)echo Option 2 here...
          sleep 2
          clear
         ;;
        3)echo Option 3 here...
          sleep 2
         ;;
        4)echo Option 4 here...
          sleep 2
         ;;
        5)echo Option 5 here...
          sleep 2
         ;;
        Q|q)echo "Quitting from main menu..."
          exit 0
          ;;
      esac
done
clear
echo "Thank you for using the Operator Administrative Tool"

Q|q)clear
           echo "Are you sure you want to quit? Y/N"
           read choice1
           case $choice1 in
              N|n)clear
                 echo "Hit Enter Key to continue"
                 read junk;;

              Y|y)quit=y;;
              *)clear
                sleep 1;;
           esac
         ;;
         esac
       ;;
        2)case $menunumber in
          sleep 2
          clear
         ;;