DESCRIPTION
Data written on a null special file is discarded.
Reads from a null special file always return 0 bytes.
EXAMPLES
To create a zero-length file, use either of the following:
cat /dev/null > file
cp /dev/null file
STANDARDS CONFORMANCE
null: AES, SVID2, SVID3, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, POSIX.2
