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Full Discussion: CHMOD settings
Top Forums UNIX for Dummies Questions & Answers CHMOD settings Post 25558 by Optimus_P on Wednesday 31st of July 2002 06:04:27 PM
Old 07-31-2002
Quote:
Originally posted by binhnx2000
I think: mod 755 is safe than 666:

root@localhost#: chmod 755

Owner: Read Write Excute
Group: Read Excute
Other: Read
man chmod !!!!!!!

Code:
n     a number from 0 to 7.  An absolute mode  is  con-
                structed  from  the  OR  of  any of the following
                modes:

                4000  Set user ID on execution.

                20#0  Set group ID on execution if # is 7, 5,  3,
                      or 1.

                      Enable mandatory locking if # is 6,  4,  2,
                      or 0.

                      For directories, files are created with BSD
                      semantics  for propagation of the group ID.
                      With this option, files and  subdirectories
                      created  in the directory inherit the group
                      ID of the directory,  rather  than  of  the
                      current process.  It may be cleared only by
                      using symbolic mode.

                1000  Turn on sticky bit. See chmod(2).

                0400  Allow read by owner.

                0200  Allow write by owner.

                0100  Allow  execute  (search  in  directory)  by
                      owner.

                0700  Allow read, write, and execute (search)  by
                      owner.

                0040  Allow read by group.

                0020  Allow write by group.

                0010  Allow  execute  (search  in  directory)  by
                      group.

                0070  Allow read, write, and execute (search)  by
                      group.

                0004  Allow read by others.

                0002  Allow write by others.

                0001  Allow execute (search in directory) by oth-
                      ers.

                0007  Allow read, write, and execute (search)  by
                      others.

 

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LEARN ABOUT V7

chmod

CHMOD(2)							System Calls Manual							  CHMOD(2)

NAME

       chmod - change mode of file

SYNOPSIS

       chmod(name, mode)
       char *name;

DESCRIPTION

       The file whose name is given as the null-terminated string pointed to by name has its mode changed to mode.  Modes are constructed by ORing
       together some combination of the following:

	       04000 set user ID on execution
	       02000 set group ID on execution
	       01000 save text image after execution
	       00400 read by owner
	       00200 write by owner
	       00100 execute (search on directory) by owner
	       00070 read, write, execute (search) by group
	       00007 read, write, execute (search) by others

       If an executable file is set up for sharing (-n or -i option of ld(1)) then mode 1000 prevents the system from  abandoning  the	swap-space
       image  of  the  program-text  portion of the file when its last user terminates.  Thus when the next user of the file executes it, the text
       need not be read from the file system but can simply be swapped in, saving time.  Ability to set this bit is restricted to  the	super-user
       since swap space is consumed by the images; it is only worth while for heavily used commands.

       Only the owner of a file (or the super-user) may change the mode.  Only the super-user can set the 1000 mode.

SEE ALSO

       chmod(1)

DIAGNOSTIC

       Zero is returned if the mode is changed; -1 is returned if name cannot be found or if current user is neither the owner of the file nor the
       super-user.

ASSEMBLER

       (chmod = 15.)
       sys chmod; name; mode

																	  CHMOD(2)
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