I've have a keytab that is scheduled to run daily(just once) to renew it's ticket. However, I wanted to find out whether keytab itself has any lifetime? I assume it doesn't as the cron job has been configured to execute daily which i think will create a new ticket instead of renewing?
Brought from mit kerberos: "A keytab (short for “key table”) stores long-term keys for one or more principals." The keytab file will store your key which allows you to automate your usage of the kerberos principals without any "human interaction". As you know the tickets are only valid between a somewhat short amount, typically between 12 and 24 hours, however the keytab is valid as long as you find it valid. By this i mean that if any third entity get hold of the keytab it loses all it's purpose.