NAME¶

chmod - Change the mode of each FILE to MODE. With --reference, change the mode of each FILE to that of RFILE.

SYNOPSIS¶

chmod [--help] [-c|--changes] [-f|--quiet] [-v|--verbose] [--no-preserve-root] [--preserve-root] [-R|--recursive] [--reference] [-H ] [-L ] [-P ] [--dereference] [-h|--no-dereference] [-V|--version] [MODE] [FILE]

DESCRIPTION¶

Change the mode of each FILE to MODE. With --reference, change the mode of each FILE to that of RFILE.

OPTIONS¶

--help

Print help information.

-c, --changes

like verbose but report only when a change is made

-f, --quiet

suppress most error messages

-v, --verbose

output a diagnostic for every file processed

--no-preserve-root

do not treat '/' specially (the default)

--preserve-root

fail to operate recursively on '/'

-R, --recursive

change files and directories recursively

--reference

use RFILE's mode instead of MODE values

-H

if a command line argument is a symbolic link to a directory, traverse it

-L

traverse every symbolic link to a directory encountered

-P

do not traverse any symbolic links (default)

--dereference

affect the referent of each symbolic link (this is the default), rather than the symbolic link itself

-h, --no-dereference

affect symbolic links instead of any referenced file (useful only on systems that can change the ownership of a symlink)

-V, --version

Print version

[MODE]

[FILE]

EXTRA¶

Each MODE is of the form [ugoa]*([-+=]([rwxXst]*|[ugo]))+|[-+=]?[0-7]+.

VERSION¶

v(uutils coreutils) 0.7.0

EXAMPLES¶

Give the [u]ser who owns a file the right to e[x]ecute it:

chmod u+x path/to/file

Give the [u]ser rights to [r]ead and [w]rite to a file/directory:

chmod u+rw path/to/file_or_directory

Remove e[x]ecutable rights from the [g]roup:

chmod g-x path/to/file

Give [a]ll users rights to [r]ead and e[x]ecute:

chmod a+rx path/to/file

Give [o]thers (not in the file owner's group) the same rights as the [g]roup:

chmod o=g path/to/file

Remove all rights from [o]thers:

chmod o= path/to/file

Change permissions recursively giving [g]roup and [o]thers the ability to [w]rite:

chmod [-R|--recursive] g+w,o+w path/to/directory

Recursively give [a]ll users [r]ead permissions to files. Also give e[X]ecute permissions to files that have at least one execution permission and to all sub-directories:

chmod [-R|--recursive] a+rX path/to/directory

The examples are provided by the tldr-pages project <https://tldr.sh> under the CC BY 4.0 License. Please note that, as uutils is a work in progress, some examples might fail.