klogin(1) on Linux
The text 646b365cab06, as Debian 3.1 (Sarge) shipped it.
Kerberos rlogin or telnet with v4 ticket forwarding
Flags it lists
-
--help -
--login -
--telnet -
--verbose -
--version -
--xauth -
-A -
-F -
-T -
-V -
-f -
-h -
-l -
-v -
-x