Simple definition
A Linux Kerberos client obtains and uses tickets to authenticate to services within a Kerberos realm.
Purpose and use
A Linux Kerberos client obtains and uses tickets for compatible services, including enterprise-domain services.
How does it work?
A principal authenticates to the KDC and presents a ticket to a service; tickets have limited validity.
Example and verification
When authentication fails, check service names, realm configuration, DNS and time synchronization.
Points to watch
Obtaining a ticket does not automatically grant resource access: the service also enforces authorization rules.
In short
Kerberos provides ticket-based authentication; access permissions remain a separate decision.