Which command would you use to change file ownership in Linux?

The command used to change file ownership in Linux is indeed 'chown'. This command modifies the ownership of a specified file or directory by allowing you to assign a new user and/or group as the owner.

When you use 'chown', you can specify the username, and optionally the group name, in the format: chown [user][:group] [file]. For instance, if you wanted to change the ownership of a file named 'example.txt' to a user named 'alice', you would use the command chown alice example.txt. Additionally, if you wanted to change both the user and the group, you could do something like chown alice:staff example.txt, where 'staff' is the group name.

The other commands listed serve different purposes. 'chmod' is used to change file permissions, not ownership. 'chgrp' changes the group ownership of a file but does not change the user ownership. Therefore, 'chown' is the correct command for altering the ownership of files and directories.