Manpage of NULL
NULLSection: Linux Programmer's Manual (4)
NAMEnull, zero - data sink
DESCRIPTIONData written to the /dev/nulland /dev/zerospecial files is discarded.
Reads from /dev/nullalways return end of file (i.e., read(2) returns 0), whereas reads from /dev/zeroalways return bytes containing zero (aq\0aq characters).
These devices are typically created by:
mknod -m 666 /dev/null c 1 3
mknod -m 666 /dev/zero c 1 5
chown root:root /dev/null /dev/zero
NOTESIf these devices are not writable and readable for all users, many programs will act strangely.
SEE ALSOchown(1), mknod(1), full(4)
This document was created by man2html, using the manual pages.
Time: 22:28:01 GMT, June 20, 2016