Which command is used to change the ownership of a file in Linux?

The command used to change the ownership of a file in Linux is chown. This command allows a user to set new owner and group ownership for a file or directory. The basic syntax includes specifying the new owner's name, optionally the new group, and then the file or directory name.

For example, using chown user:group filename would change the ownership of "filename" to the specified user and group. This is useful in managing permissions and access control on a system, ensuring that files are owned and managed by the appropriate users or groups.

The other commands serve different purposes: chmod is used for changing file permissions, mv is for moving or renaming files, and ls is for listing directory contents. Understanding the distinctions between these commands is crucial for effective file and system management in Linux.