from - print names of those who have sent mail
from [-c? [-s sender? [-f file? [user?
The from utility prints out the mail header lines from the
- c Just print a count of messages and exit.
f fileThe supplied file is examined instead of theinvoker's mailbox. If the -f option is used, theuser argument should not be used. Read fromstandard input if file name - is given.-s senderOnly mail from addresses containing the suppliedstring are printed.If user is given, the user's mailbox is examined instead ofthe invoker's own mailbox. (Privileges are required.)ENVIRONMENT
If set, the location of the invoker's mailbox.
Otherwise, the default in /var/mail is used.
The from command appeared in 3.0 BSD
BSD December 30, 1993 1