chown and chgrp Basics - Changing File Ownership in Linux

2026-06-01 Reading time: About 9 min Difficulty: Intermediate

What chown and chgrp Do

chown changes the owner of a file, and chgrp changes the group. The chown user:group syntax lets you change both at once.

Checking Current Ownership with ls -l

The 3rd and 4th columns of ls -l output show the owner and group.

$ ls -l /var/www/html/index.html

-rw-r--r-- 1 root root 1024 Jun  1 10:00 /var/www/html/index.html

chown Syntax

Use chown to change the owning user. You need sudo to change ownership on files you do not own.

Change owner only

$ sudo chown www-data /var/www/html/index.html
$ ls -l /var/www/html/index.html

-rw-r--r-- 1 www-data root 1024 Jun  1 10:00 /var/www/html/index.html

Change owner and group at once

Use the user:group form to update both in a single command.

$ sudo chown www-data:www-data /var/www/html/index.html
$ ls -l /var/www/html/index.html

-rw-r--r-- 1 www-data www-data 1024 Jun  1 10:00 /var/www/html/index.html

Change group only (chown :group syntax)

Leave the user part empty to change only the group while keeping the current owner.

$ sudo chown :developers /var/www/html/

chgrp Syntax

chgrp is the dedicated command for changing the group. It is functionally equivalent to chown :group.

$ sudo chgrp www-data /var/www/html/index.html
$ ls -l /var/www/html/index.html

-rw-r--r-- 1 root www-data 1024 Jun  1 10:00 /var/www/html/index.html

Use chgrp when you want to make the intent of changing only the group explicit in a script or command history.

Recursive Changes with -R

Add -R to apply the change to all files and subdirectories inside a directory.

$ sudo chown -R www-data:www-data /var/www/html/
$ ls -la /var/www/html/

drwxr-xr-x 2 www-data www-data 4096 Jun  1 10:00 .
drwxr-xr-x 3 root     root     4096 Jun  1 09:00 ..
-rw-r--r-- 1 www-data www-data 1024 Jun  1 10:00 index.html
-rw-r--r-- 1 www-data www-data  512 Jun  1 10:00 style.css

Common Usage Patterns

Web server deployment (Nginx / Apache)

# Transfer ownership to the web server user after deploying files
$ sudo chown -R www-data:www-data /var/www/myapp/

Handing off to an application user

$ sudo chown -R deploy:deploy /opt/myapp/

Reclaiming files created with sudo

Files created with sudo are owned by root. Reclaim them with:

$ sudo chown $USER:$USER ~/myfile.txt

$USER expands to your current login name automatically.

Common Errors and Fixes

Operation not permitted

chown: changing ownership of 'file.txt': Operation not permitted

Cause: Only root can change ownership. Run with sudo.

$ sudo chown user:group file.txt

invalid user / invalid group

chown: invalid user: 'webmaster'
chgrp: invalid group: 'webteam'

Cause: The specified user or group does not exist on the system.

# List users
$ getent passwd | cut -d: -f1

# List groups
$ getent group | cut -d: -f1

Summary

# Check before
ls -la /path/to/target

# Apply change
sudo chown -R user:group /path/to/target

# Verify after
ls -la /path/to/target