Let's break this command down into parts: 1  ls is a utility. Utilities are also sometimes known as commands all on their own, because they indicate the general idea of what you want. - 2 l is a flag that alters how the utility operates.
Publisher and copyright holder are both different persons, a copy right holder is the author of a piece of art, literary works, drama, novels, story etc etc and a publisher is a person who or a publishing house who takes the copyright from the author or rights of the work and publishes it as a book or film etc etc.
The copyright in a work of authorship immediately becomes the property of the author who created it at the moment it is put into fixed form. No one but the author can claim copyright to the work, unless the author grants rights to others in a written agreement (such as to the author's publisher or record company). Usually, you can tell who the author of a work is -- the person who created it.