Which command would you use to change the ownership of a file?

The command used to change the ownership of a file is "chown." This command allows users to specify a new owner and, optionally, a new group for the file or directory in question. The syntax typically involves specifying the new owner, followed by the name of the file. For example, using chown username filename changes the ownership of "filename" to "username."

This command is crucial for managing file permissions and access control in Linux, as it directly affects who can read, write, or execute the file. Understanding how to use "chown" effectively is essential for system administrators who need to maintain security and proper access rights for various users.

The other options listed—chmod, owner, and attribute—serve different purposes. "chmod" is used to change the permissions of a file, allowing specification of read, write, and execute permissions for different user categories. "owner" and "attribute" are not valid commands in Linux for changing file ownership or permissions. Therefore, "chown" is the correct command for this task.