I have noticed a couple of messages about my Kerberos credentials expiring.
What does this actually mean and what will happen when they expire?
How do I renew them? Is it just a case of logging in again?
-bash-3.00$ Message from firstname.lastname@example.org [ 28 August 2009 01:58:53 BST ] ... Message to email@example.com: your kerberos credentials expire in less than 30 minutes. <EOT>