sdm is an X11 display manager similar to xdm, gdm and kdm, but unlike those it wraps the X11 traffic within an ssh tunnel to provide a secure login mechanism for remote X sessions. sdm provides access only through SSH, not locally. It is technically possible to access an sdm server from same host, but probably a waste of CPU power. . This package contains helper files for a terminal to connect to an sdm server, and should be installed on any computer accessing an sdm server. . Homepage: http://www.lessdisks.net/