from(1) on Linux
The text c9c33c240db3, as Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.2 (Rex), Debian 1.1 (Buzz) shipped it.
print names of those who have sent mail
Flags it lists
-
-f -
-s