This is the command biff that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
biff — be notified if mail arrives and who it is from
Biff informs the system whether you want to be notified when mail arrives during the current
Options supported by biff:
n Disables notification.
y Enables notification.
When mail notification is enabled, the header and first few lines of the message will be
printed on your screen whenever mail arrives. A “biff y” command is often included in the
file .login or .profile to be executed at each login.
Biff operates asynchronously via the comsat(8) service. If that service is not enabled, biff
will not do anything. In that case, or for synchronous notification, use the MAIL variable
of sh(1) or the mail variable of csh(1).
Use biff online using onworks.net services