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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.

Authenticate a user and obtain a ticket-granting ticket:

kinit {{username}}

Renew a ticket-granting ticket:

kinit -R

Specify a lifetime for the ticket:

kinit -l {{5h}}

Specify a total renewable lifetime for the ticket:

kinit -r {{1w}}

Specify a different principal name to authenticate as:

kinit -p {{principal@REALM}}

Specify a different keytab file to authenticate with:

kinit -t {{path/to/keytab}}