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→File Permissions
'''NOTE:''' In this course, we cannot create groups or assign users to groups - you may learn how to do<Br>that if you take a Unix/Linux administration account.
On the other hand, you can change which '''user''',<br>existing '''same group members''' or existing '''other group members''' can or cannot access a directory or regular file.<br><br>
<table align="right"><tr><td>[[Image:directory-permissions.png|thumb|right|350px|Permissions of a '''directory''' that contain subdirectories and regular files.]]</td><td>[[Image:file-permissions.png|thumb|right|350px|Permissions of a '''regular file''' contained within a directory.]]</td></tr></table>
Permissions act like a '''two-layered defence''':<br><br>First, the permissions of a '''directory''' that contains regular files, and second, permissions of the '''regular files''' themselves.
