Shell-Skript

 while :
 do
  clear
  echo -------------------------------------
  echo  Main Menu 
  echo -------------------------------------
  echo [1] Show Todays date/time
  echo [2] Show files in current directory
  echo [3] Show calendar
  echo [4] Start editor to write letters
  echo [5] Exit/Stop
  echo =======================
  echo -n Enter your menu choice [1-5]: 
  read yourch
  case $yourch in
   1) echo Today is `date` , press a key. . . ; read ;;
   2) echo Files in `pwd` ; ls -l ; echo Press a key. . . ; read ;;
   3) cal ; echo Press a key. . . ; read ;;
   4) vi ;;
   5) exit 0 ;;
   *) echo Opps!!! Please select choice 1,2,3,4, or 5;
     echo Press a key. . . ; read ;;
 esac
done