Every file is owned by a specific user (or UID) and a specific group (or GID).
ownership
View a long listing of files and directories. The long listing shows the mode of each file and directory along with ownership information.
ls -l
Change the ownership of a file or directory. Be aware of the following options:
chown
Change the group owner of a file or directory.
chgrp
An __________is a data structure on a filesystem on Linux that stores all the information about a file except its name and its actual data. This includes such things as when it was last modified, size, data block location, permissions, and ownership.
inode