/dev/zero 라는 것

Ryu_pyung · 11월 27, 2009, 2:16오전

실수로 /dev/zero를 지웠는데요…
다시 살릴수 없을까요…ㅡㅡ;;
아무래도 지우면 안되는거 였는데…;;;

Lbird · 11월 27, 2009, 5:42오전

man page에서 긁어 옵니다~

[code:3ielog2n]
NULL(4) Linux Programmer’s Manual NULL(4)

NAME
null, zero - data sink

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

   Reads  from  the  null  special  file  always return end of file (i&#46;e&#46;,
   read(2) returns 0), whereas reads from zero always  return  bytes  con‐
   taining zero (\0 characters)&#46;

   null and zero are typically created by&#58;

          mknod -m 666 /dev/null c 1 3
          mknod -m 666 /dev/zero c 1 5
          chown root&#58;root /dev/null /dev/zero

FILES
/dev/null
/dev/zero

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