To use Kerberos authentication, the application user first must obtain a Kerberos Ticket Granting Ticket (TGT) from the Kerberos server. The Kerberos server verifies the identity of the user and controls access to services using the credentials contained in the TGT.
If the application uses Kerberos authentication from a Windows client, the application user is not required to log onto the Kerberos server and explicitly obtain a TGT. Windows Active Directory automatically obtains a TGT for the user.
If an application uses Kerberos authentication from a UNIX or Linux client, the user must log onto the Kerberos server using the kinit command to obtain a TGT. For example, the following command requests a TGT from the server with a lifetime of 10 hours, which is renewable for 5 days:
kinit -l 10h -r 5d user
where user is the application user.
Refer to your Kerberos documentation for more information about using the kinit command and obtaining TGTs for users.
