Talk:Chmod
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Is it appropriate to just dump man pages here? :-) -- Marj Tiefert, Saturday, April 27, 2002
- probably not. -- Tarquin 21:54 27 May 2003 (UTC)
- No context is established or anything. Since the present article actually contains a lot of information, maybe it is not inviting to rewrite the article. -- Sverdrup 19:30, 10 Dec 2003 (UTC)
- (Note: it has not been touched since april 2002. Thus, we cannot have an article in this state. I'll replace it with a temporary article with less information content.) Sverdrup
Contents |
[edit] Man page dump
(Old article content)
chmod - change the access permissions of files
SYNOPSIS
chmod [-Rcfv] [--recursive] [--changes] [--silent]
[--quiet] [--verbose] [--help] [--version] mode file...
DESCRIPTION
This manual page documents the GNU version of chmod.
chmod changes the permissions of each given file according
to mode, which can be either a symbolic representation of
changes to make, or an octal number representing the bit
pattern for the new permissions.
The format of a symbolic mode is `[ugoa...][[+-=][rwxXs-
tugo...]...][,...]'. Multiple symbolic operations can be
given, separated by commas.
A combination of the letters `ugoa' controls which users'
access to the file will be changed: the user who owns it
(u), other users in the file's group (g), other users not
in the file's group (o), or all users (a). If none of
these are given, the effect is as if `a' were given, but
bits that are set in the umask are not affected.
The operator `+' causes the permissions selected to be
added to the existing permissions of each file; `-' causes
them to be removed; and `=' causes them to be the only
permissions that the file has.
The letters `rwxXstugo' select the new permissions for the
affected users: read (r), write (w), execute (or access
for directories) (x), execute only if the file is a direc-
tory or already has execute permission for some user (X),
set user or group ID on execution (s), save program text
on swap device (t), the permissions that the user who owns
the file currently has for it (u), the permissions that
other users in the file's group have for it (g), and the
permissions that other users not in the file's group have
for it (o).
A numeric mode is from one to four octal digits (0-7),
derived by adding up the bits with values 4, 2, and 1.
Any omitted digits are assumed to be leading zeros. The
first digit selects the set user ID (4) and set group ID
(2) and save text image (1) attributes. The second digit
selects permissions for the user who owns the file: read
(4), write (2), and execute (1); the third selects permis-
sions for other users in the file's group, with the same
values; and the fourth for other users not in the file's
group, with the same values.
chmod never changes the permissions of symbolic links; the
are never used. However, for each symbolic link listed on
the command line, chmod changes the permissions of the
pointed-to file. In contrast, chmod ignores symbolic
links encountered during recursive directory traversals.
OPTIONS
-c, --changes
Verbosely describe only files whose permissions
actually change.
-f, --silent, --quiet
Do not print error messages about files whose per-
missions cannot be changed.
-v, --verbose
Verbosely describe changed permissions.
-R, --recursive
Recursively change permissions of directories and
their contents.
--help Print a usage message on standard output and exit
successfully.
--version
Print version information on standard output then
exit successfully.
[edit] Removed the wrong-title tamplate from the dump
-don't want it on the talk page. Rich Farmbrough 14:09, 29 Jan 2005 (UTC)
[edit] Rewrite and Section Update
I added some content, and simplified the sections. Hopefully this rewrite is more readable and understandable. Gbeeker 15:32, 9 September 2005 (UTC)
[edit] String mode examples
I created a subsection of string mode examples, and then realized there is already an example section. Both can probably be combined. When I have a chance, I'll do that, unless someone else beats me to it. --Unixguy 19:39, 8 December 2006 (UTC)
[edit] Tables
Anyone wanna clean up that table with the usage? The X entry is particularly long and hard to read. — SheeEttin {T/C} 23:08, 6 March 2007 (UTC)
