Invisible login

Hello! My 1st post here, and I am not so sure if it belongs to the "Andvanced" category! I have searched very much to find a way to login to a system in such a way, that others will not be able to "see" me, with the "who" command!

So, is there anybody here to help me with this? :rolleyes:

Thanx for reading my post!

I cannot see any legitimate reason for asking the question, and am therefore closing this thread.