krb5-rlogin(1) on Linux
The text 7bfd53d6331f, as Debian 3.0 (Woody) shipped it.
remote login
Flags it lists
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-7 -
-8 -
-F -
-L -
-PN -
-PO -
-a -
-c -
-d -
-e -
-f -
-k -
-n -
-t -
-x