from - print names of those who have sent mail
from [-s sender] [-f file] [user]
from prints out the mail header lines from the invoker's
mailbox.
The options are as follows:
-f file
The supplied file is examined instead of the invoker's mailbox.
If the -f option is used, the user argument should
not be used.
-s sender
Only mail from addresses containing the supplied
string are
printed.
If user is given, the user's mailbox, is examined instead of
the invoker's
own mailbox. (Privileges are required.)
/var/mail/*
biff(1), mail(1)
The from command appeared in 3.0BSD.
OpenBSD 3.6 December 30, 1993
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