Originally Posted by micro_xii
How to make this user "jack" hidden...just like "root"
If you are using the KDM Greeter you need to edit the kdmrc
Look for this section in that file: [X-*-Greeter]
Then find this line: HiddenUsers=blah,blah,blah
add the name of the user you want to hide at the end of the line.
Don't forget to put a ,
before the name.