DOKK / manpages / debian 12 / freebsd-manpages / null.4freebsd.en
NULL(4) Device Drivers Manual NULL(4)

nullthe null device

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.

/dev/null
 

full(4), zero(4)

A null device appeared in Version 4 AT&T UNIX.

August 30, 2019 Debian