Jim Sabatke <jsabatke@execpc.com> writes:

...

Forget about "xhost +localhost". Use "sux" instead of "su" and you won't need the dangerous xhost. ("man xhost" will give you more info.)

Unless you need it, like I do for some KOffice development.

Are you really sure you need host-based access control in X? Actually, I hope this mechanism will be removed from the "production" version of X in the future since too many people use it without knowing how insecure it is. People think Linux is safer than MS-Windows but they don't realize there are many old concepts in Linux which, if not used cautiously, can make the system very insecure (telnet, ftp, .rhosts based authentication, NFS, ...) -- A.M.