Menu and case statement scripting

hi all
i am trying to get help with writing a script using case statement to display menu as

1) Authentication log 
2) System log 
3) Messages 
4) Dmesg 
5) Boot log 
Q) Exit 

When selecting the menu by 1 or 2 or 3 o 4 or 5 , it should display the last 10 lines of the log files,
if selected wrongly it should give an error and should not exit, rather the user should be able to
try again. Only entering Q it should exit.

look into man select (for ksh/bash shells)

Or use the search function of the forum.

Additionaly, what have you tried so far?

This is everything that you wanted to know:

Google