Which command allows you to assign read, write, and execute permissions to the owner, group, and others for a file?

Explanation

The 'chmod' command is used to modify the permissions of a file, enabling you to set read, write, and execute rights for the file owner, group, and others. 'chgrp' changes the group ownership, 'chown' alters the owner, and 'chusr' is not a valid command.