Converting lowercase to uppercase
 

I'm trying to convert a file which is in all uppercase so that the output when read out will be lower case.. or vice vera, but i don't know how to do it.

I've looked up man bash and it says something about upcase and M-u but i can't get it to work... anyone have any ideas how to do this?

haha nevermind i found out how to do it..

A=TEST

echo $A | tr "[A-Z]" "[a-z]"


output: test

:D