rwx means the file can be read, written, and executed. r-x means the file can be read and executed, but not written to. rw- would mean the file can be read and written to, but the file isn’t executable. r- would mean the file can be read, but not written to, and the file isn’t executable. 
- would mean no read or write access, and the file isn’t executable. These levels are always shown in that order, so for instance: You’ll see letters here, too, such as r (read), w (write), and x (execute). The first group shows the access levels for the file/folder owner (1), the middle group shows group permissions (2), and the final three shows permissions for any other users (3). 
The next nine characters are split into groups of three.
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