Kerberos kinit variant supporting ticket refreshing. k5start (for Kerberos v5) and k4start (for Kerberos v4) can be used instead of kinit to obtain Kerberos tickets. krenew can renew an existing ticket cache. They are intended primarily for use with automated processes and support some additional features useful for that purpose, such as running as a daemon and refreshing the ticket periodically, checking to see if an existing ticket has expired, or obtaining an AFS token along with the ticket by running an external program automatically.