$                                                            
$ cat menu.sh                                                
#!/bin/bash                                                  
#set -vx                                                     

while :
do     
  clear
  # Display menu
  echo          
  echo  "*************************************************************"
  echo  "Please choose from the following options; type the"           
  echo  "option number and hit the <Enter> key."                       
  echo                                                                 
  echo  "   1) To list names of the files in the current DIR"          
  echo  "   2) Display today's date and time"                          
  echo  "   3) Display a sorted list of people currently logged on"    
  echo  "   4) Display whether a file is a file or a DIR"              
  echo  "   5) Create a backup for a file"                             
  echo  "   6) Find a user by First of Last name in /etc/passwd file"  
  echo  "   7) Find the manual pages for a specific command"           
  echo  "   8) Exit"                                                   
  echo                                                                 
  echo  "*************************************************************"
  read option                                                          
  case "$option" in                                                    
      1)    echo "The files in the current DIR are: "                  
            ls -l                                                      
            echo "Hit <Enter> to continue."                            
            read ignore                                                
            ;;                                                         
      2)    echo "The current date is: "                               
            date                                                       
            unset date                                                 
            echo "Hit <Enter> to continue."                            
            read ignore                                                
            ;;                                                         
      3)    echo "The following is a list of the academic scholars"    
            echo "currently logged in:"                                
            who | cut -d " " -f1 | sort -u                             
            echo "Hit <Enter> to continue."                            
            read ignore                                                
            ;;                                                         
      4)    echo "Enter file to determine whether a simple file or a directory:"
            read fdname                                                         
            if [ ! -e $fdname ]; then                                           
              echo "$fdname does not exist."                                    
            elif [ -d $fdname ]; then                                           
              echo "$fdname is a directory."                                    
            elif [ -f $fdname ]; then                                           
              echo "$fdname is a regular file."                                 
            else                                                                
              echo "$fdname is something else."                                 
            fi                                                                  
            echo "Hit <Enter> to continue."                                     
            read ignore                                                         
            ;;                                                                  
      5)    echo "Enter the file you would like to create a backup for:"        
            read fname                                                          
            if [ ! -e $fname ]; then                                            
              echo "$fname does not exist."                                     
            elif [ ! -f $fname ]; then                                          
              echo "$fname is not a regular file."                              
            else                                                                
              cp "$fname" "$fname.bkp"                                          
              echo "Created backup $fname.bkp for $fname"
            fi
            echo "Hit <Enter> to continue."
            read ignore
            ;;
      6)    echo "Enter user's first or last name:"
            read flname
            grep $flname /etc/passwd
            if [ $? -ne 0 ]; then
              echo "Sorry, $flname was not found in /etc/passwd"
            fi
            echo "Hit <Enter> to continue."
            read ignore
            ;;
      7)    echo "Enter command for which you would like the manual:"
            read cmd
            man $cmd
            echo "Hit <Enter> to continue."
            read ignore
            ;;
      8)    echo "Thank You for using Skynet"
            echo "Remember: Skynet is the Future"
            sleep 1.5
            break
            ;;
      *)   echo "Invalid option; valid ones are from 1 to 8"
           echo "Hit <Enter> to continue."
           read ignore
           ;;
  esac
done

$
$