Add a Service Principal to a Keytab 

Use the ktadd command of kadmin to add a service principal to a keytab.

"How to Add a Service Principal to a Keytab"

Remove a Service Principal from a Keytab 

Use the ktremove command of kadmin to remove a service from a keytab.

"How to Remove a Service Principal From a Keytab"

Display the Keylist (Principals) in a Keytab 

Use the ktutil command to display the keylist in a keytab.

"How to Display the Keylist (Principals) in a Keytab"

Temporarily Disable Authentication for a Service on a Host 

This procedure is a quick way to temporarily disable authentication for a service on a host without having to have kadmin privileges. Before using ktutil to delete the service principal from the server's keytab, copy the original keytab to a temporary location. When you want to enable the service again, copy the original keytab back.

"How to Temporarily Disable Authentication for a Service on a Host"