System Administration Guide: Security Services

Do You Need to Worry About Tickets?

With SEAM 1.0 or 1.0.1 installed, Kerberos is built into the login command, and you will obtain tickets automatically when you log in.

Most of the Kerberized commands also automatically destroy your tickets when they exit. However, you might want to explicitly destroy your Kerberos tickets with kdestroy when you are finished with them, just to be sure. See How to Destroy Tickets for more information on kdestroy.

For information on ticket lifetimes, see Ticket Lifetimes.