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→File Permissions
When '''directories''' and r'''egular files''' are created, they are assigned to an '''owner'''<br>(typically the username which is the creator).
To ''allow'' or ''limit'' '''access''' to those<br>files and directories, those files and directories are assigned to an initial '''group''' referred to as a "'''primary group'''".
[[Image:directory-permissions.png|thumb|right|350px|Permissions of a '''directory''' that contain subdirectories and regular files.]]
Users that <u>own</u> those ''directories'' and ''regular files'' are referred to as '''users''', users that belong within<br>the <u>same group</u> are referred to as '''same group members''', and those users that<br>do <u>NOT</u> belong to a particular group are referred to as '''other group members'''.
'''NOTE:''' In this course, we CANNOT create groups or assign users to groups in the '''Matrix''' server.<br>Instead, you may learn how to those tasks when or if you take a Unix/Linux administration course.<br>On the other hand, you can change which '''user''', '''same group members''' or '''other group members'''<br>can access or NOT access a directory or regular file.<br><br>
