krb5-ftp(1) on Linux
The text d823fe6aa249, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
ARPANET file transfer program
Flags it lists
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-d -
-f -
-g -
-i -
-n -
-t -
-u -
-v -
-x