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BIFF(1)			FreeBSD	General	Commands Manual		       BIFF(1)

     biff -- be	notified if mail arrives and who it is from

     biff [n | y | b]

     The biff utility informs the system whether you want to be	notified on
     your terminal when	mail arrives.

     Affected is the first terminal associated with the	standard input,	stan-
     dard output or standard error file	descriptor, in that order.  Thus, it
     is	possible to use	the redirection	facilities of a	shell to toggle	the
     notification for other terminals than the one biff	runs on.

     The following options are available:

     n	     Disable notification.

     y	     Enable header notification.

     b	     Enable bell notification.

     When header notification is enabled, the header and first few lines of
     the message will be printed on your terminal whenever mail	arrives.  A
     ``biff y''	command	is often included in the file .login or	.profile to be
     executed at each login.

     When bell notification is enabled,	only two bell characters (ASCII	\007)
     will be printed on	your terminal whenever mail arrives.

     If	no arguments are given,	biff displays the present notification status
     of	the terminal to	the standard output.

     The biff utility operates asynchronously.	For synchronous	notification
     use the MAIL variable of sh(1) or the mail	variable of csh(1).

     The biff utility exits with one of	the following values:

     0	     Notification is enabled.

     1	     Notification is disabled.

     >1	     An	error occurred.

     Previous versions of the biff utility affected the	terminal attached to
     standard error without first trying the standard input or output devices.

     csh(1), mail(1), sh(1), comsat(8)

     The biff command appeared in 4.0BSD.  It was named	after the dog of Heidi
     Stettner.	He died	in August 1993,	at 15.

FreeBSD	11.0			 July 9, 2002			  FreeBSD 11.0


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