null man page on CentOS

null man page on CentOS

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NULL(4)			   Linux Programmer's Manual		       NULL(4)

NAME
       null, zero - data sink

DESCRIPTION
       Data written on a null or zero special file is discarded.

       Reads  from  the	 null  special file always return end of file, whereas
       reads from zero always return \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

NOTES
       If these devices are not writable and readable for all users, many pro‐
       grams will act strangely.

FILES
       /dev/null
       /dev/zero

SEE ALSO
       chown(1), mknod(1), full(4)

Linux				  1992-11-21			       NULL(4)

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