cattani wrote:
removing tty0 means every user except root can log in, but every user can do a su - and become root, right? this way one has to break two passwords to gain root access.
Yes, anyone but root could login through the console, and then they could su from there if they are normally allowed to. Really this would require three passwords - lish, regular user, root.
However if they can login to lish, that means they can access your account and do pretty much anything they want, for example installing and booting into a new disk image, or canceling your account. Probably no limit to the BadThings they could do with that one password.