print names of those who have sent mail
from utility prints out the mail header lines from
the invoker's mailbox.
The following options are available:
- Just print a count of messages and exit.
- The supplied file is examined instead of the
invoker's mailbox. If the
-f option is used, the
user argument should not be used. Read from standard
input if file name “
- 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.)
- If set, the location of the invoker's mailbox. Otherwise, the default in
/var/mail is used.
from command appeared in