rlogin(1) on Linux
The text df79e7d16d29, as Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo) shipped it.
remote login
Flags it lists
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-8 -
-E -
-K -
-L -
-d -
-e -
-k -
-x