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}}