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Could not update .ICEauthority

Today I hit the Could not update .ICEauthority /home//.ICEauthority error message when I rebooted one of my Fedora 15 systems and attempted to login. The fix is trivial. Login on a virtual terminal or via SSH, become root and execute: chmod -R /home/ rm /var/lib/gdm/.ICEauthority* Typically this problem occurs when your .ICEauthority file is no longer owned by you because you ran some graphical applications as sudo root. So what is the .ICEauthority file and what is its purpose? Basically ICE is a acronym for the Inter-Client Exchange protocol which is an inter process communication protocol with authentication, protocol negotiation