What command is used to change the ownership of a file?

The command used to change the ownership of a file is "chown." This command allows users to set the owner and/or group associated with a file or directory. By using "chown," you can specify a new owner (and optionally a group) for the file, which is a critical operation when managing permissions and access control within a Linux system.

The command is typically used in the format "chown newowner:newgroup file," where you can replace "newowner" with the username of the new owner, "newgroup" with the group name, and "file" with the filename. This ability to change ownership is essential for system administration and managing users and their access to files.

Other commands like "chmod" are related to changing permissions, not ownership. Commands like "copy" (often denoted as "cp") and "mv" are used for copying and moving files respectively, but they do not have any functionality relating to changing file ownership.