[진주]님이 남기신 글:

>/dev/null파일로 심볼릭 링크 시키다가 잘 안되서(-_-;)
>null파일을 날리구 
>touch null에서 새로 만들었는데 
>로긴 할때마다 이런 것이 뜨네여. 
>
>bash: /dev/null: 허가 거부됨
>[: -eq: unary operator expected
>bash: /dev/null: 허가 거부됨
>[: integer expression expected before -eq
>
>원래 null crw-rw----이었는데 
>touch로 만든 null의 퍼미션은 -rw-rw----이거덩여?
>이것을 crw-rw----로 바꿔줘야할 것 같은데.. 
>당최 c란 것이 뭔지 몰겠네여. 
>
>좀 가르쳐 주세여.. 

========================================


# mknod -m 660 /dev/null c 1 3

으로 해보세요....


------------------------

# man null
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:mem /dev/null /dev/zero


NOTES
       If these devices are not writable  and  readable	 for  all
       users, many programs will act strange.

FILES
       /dev/null
       /dev/zero

SEE ALSO
       mknod(1), chown(1)

-------------------


# man mknod
SYNOPSIS
       mknod [OPTION]... NAME TYPE [MAJOR MINOR]

DESCRIPTION
       Create the special file NAME of the given TYPE.

       -m, --mode=MODE
	      set permission mode (as in chmod), not 0666 - umask

       --help display this help and exit

       --version
	      output version information and exit

       MAJOR MINOR are forbidden for TYPE p, mandatory otherwise.
       TYPE may be:

       b      create a block (buffered) special file

       c, u   create a character (unbuffered) special file

       p      create a FIFO

REPORTING BUGS
       Report bugs to <bug-fileutils@gnu.org>.

SEE ALSO
       The  full  documentation for mknod is maintained as a Tex
       info manual.  If the info and mknod programs are	 properly
       installed at your site, the command

	      info mknod

       should give you access to the complete manual.