kinit

Authenticate a principal with a Kerberos server to gain and cache a ticket. Note: A Kerberos principal can be either a user, service, or application. More information: https://web.mit.edu/kerberos/krb5-1.12/doc/user/user_commands/kinit.html.

kinit username

kinit -R

kinit -l 5h

kinit -r 1w

kinit -p principal@REALM

kinit -t path/to/keytab