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other sections
NULL(4) | Linux Programmer's Manual | NULL(4) |
NAME¶
null, zero - data sinkDESCRIPTION¶
Data written to a null or zero special file is discarded. Reads from the null special file always return end of file (i.e., read(2) returns 0), whereas reads from zero always return bytes containing zero (\0 characters). null and zero 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
FILES¶
/dev/nullNOTES¶
If these devices are not writable and readable for all users, many programs will act strangely.SEE ALSO¶
chown(1), mknod(1), full(4)COLOPHON¶
This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.2009-02-23 | Linux |