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NULL(4)                  BSD Kernel Interfaces Manual                  NULL(4)

NAME
     null -- the null device

DESCRIPTION
     The null device accepts and reads data as any ordinary (and willing) file - but throws it away. The
     length of the null device is always zero.

FILES
     /dev/null

HISTORY
     A null device appeared in Version 7 AT&T UNIX.

BSD                              June 5, 1993                              BSD