First FreeNX problem and solution

I experienced my first problem with FreeNX : couldn't reconnect after a hard reboot. (Some electrical problems in house, but it is solved now : at least there is light in the bathroom.) Anyway, the error message looked like some old stuff was pertubing the session. So some simple commands to remember :
nxserver --list # Gives the list of session
nxserver --terminate SessionId # Terminate a session
nxserver --history # Gives the list of historic sessions
nxserver --hitory clear # Solved my problem !!

That all Folks