Other Session Configure a user default session — Specify the default session for a user. Configure single-application mode — Set up a kiosk-like, single-application system. Create a custom session — Create a custom session by installing a desktop session file. Debug session problems — What happened to ~/.xsession-errors? Typical processes — Which processes should I expect to see running in a pristine, stock GNOME session? More Information GNOME System Administration Guide — A guide for GNOME 3 system administrators.