Команда chown
Command for system V that changes the owner of a file.
chown [-R] newowner filenames
| -R | Change the permission on files that are in the subdirectories of the directory that you are currently in. |
| newowner | The alias/username of the new owner of the file. |
| filenames | The file that you are changing the rights to. |
chown chope file.txt - Give permissions as owner to user chope.