How to Change File Ownership & Groups in Linux

File ownership and groups for files are fundamental to the Linux operating system. Every file in Linux is managed by a specific user and a specific group.

Figure Out Who Owns the File, Then Use Either chown or chgrp

Display ownership and group information using the following command:

This file is owned by the root user and belongs to the www-data group.

Changing the Ownership of a File Using chown

You can change the ownership of a specific file using the chown command. For security purposes only, the root user or members of the sudo group may transfer ownership of a file.

To change the ownership of a file:

The file file.txt is now owned by Robert. By default, chown follows symbolic links and changes the owner of the file pointed to by the symbolic link. If you wish to change ownership of all files inside a directory, you can use the -R option.

Changing the Group Ownership of a File Using chgrp

All users on the system belong to at least one group. You can find out which groups you belong to using the following command:

You can then change the group ownership of a specific file using the chgrp command:

The file file.txt now belongs to the webdev group.

Changing Both the Owner and the Group Using chown

You can change both the owner and group of a file using just the chown command.

The file file.txt is now owned by Tito and belongs to the editors group.

ABOUT THE AUTHOR
PJ Fancher

PJ Fancher is a professional web developer with 16 years of experience. His background began with writing small web applications using Perl, PHP, and MySQL in 1998. He has well-rounded experience with all aspects of web development, from server and database configuration, to scripting, styling, design, and SEO. Today he brings his passion for web development to the team at Digital Brands Inc., helping to develop unique, high-quality, highly-optimized websites. He is ready to share his extensive knowledge and experience with the world of web hosting.