Possible Duplicate: How do I change the guest session defaults In Ubuntu 10.04, I am able to create a guest session from the indicator-applet-session applet menu. When it is active, this session has its home folder in /tmp, an entry in /etc/passwd and /etc/shadow, and so on. This temporary guest user and its session exists only while it is active. I want to know how this guest session is created, because I want to modify it a bit.