Linux basic command-chgrp

Chgrp

Change the group to which the file or directory belongs. Use the parameter "--reference" to change the file group to the specified associated file group. The scope of this command: RedHat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.

1. Grammar

Chgrp [options] group file

Chgrp [options]-reference=RFILE file

2. List of options

Option

Description

-- version

Display command version information

-- help

Show help documentation

-c |-- changes

Same as verbose, but only show details when a change occurs

-- dereference

Change the file that the symbolic link points to, not the symbolic link itself. This is the default option

-h |-- no-dereference

Modify symbolic links, only for systems that can change symbolic link ownership

-- no-preserve-root

No special treatment "/", default option

-- preserve-root

Failed to perform recursive operation on "/"

-f |-- silent |-- quiet

Ignore some error messages

-- reference=file

Use the group to which the associated file belongs instead of pointing to a specific value

-R,-- recursive

Recursively process directories and their internal files

-v |-- verbose

Show details

-H

If the command line argument is a symbolic link to the directory, traverse it. Use with "- R"

-L

Traverse each symbolic link to the directory encountered. Use with "- R"

-P

Do not traverse any symbolic links (default). Use with "- R"

3. Example-

1) modify the group to which the file belongs

[root@localhost weijie] # ls-l / / use ls to view details

The total dosage is 1072

-rw-r--r-- 1 root root 7 September 09:11 1.c

-rw-r--r-- 3 root root 358400 September 7 15:46 link

[root@localhost weijie] # chgrp weijie 1.c / / modify the group

[root@localhost weijie] # ls-l / / check again, the modification has been successful

The total dosage is 1072

-rw-r--r-- 1 root weijie 7 September 09:11 1.c

-rw-r--r-- 3 root root 358400 September 7 15:46 link

2) use the option "--reference"

[root@localhost weijie] # chgrp-- reference=1.c my.iso / / 1.c 's group is already weijie

[root@localhost weijie] # ls-l

The total dosage is 1072

-rw-r--r-- 1 root weijie 7 September 09:11 1.c

-rw-r--r-- 3 root weijie 358400 September 7 15:46 my.iso / / my.iso group also becomes wiejie

3) modify only symbolic links themselves

[root@localhost wj] # ls-l 1.c 11.c / / View file information

Lrwxrwxrwx 1 root root 3 October 26 10:11 11.c-> 1.c

-rw-r--r-- 1 root root 0 October 24 10:12 1.c

[root@localhost wj] # chgrp-h weijie 11.c / / modify the group

[root@localhost wj] # ls-l 1.c 11.c / / View file information, only symbolic links have their own groups modified

Lrwxrwxrwx 1 root weijie 3 October 26 10:11 11.c-> 1.c

-rw-r--r-- 1 root root 0 October 24 10:12 1.c