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====== Permissions for Directories ======
<color darkorange>2016</color>

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The same series of permissions may be used for directories but they have a slightly different behaviour.
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        r - you have the ability to read the contents of the directory (ie do an ls)
        w - you have the ability to write into the directory (ie create files and directories)
        x - you have the ability to enter that directory (ie cd)
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Example:
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        ls testdir (list testdir contents)
        file1  file2  file3
        
        chmod 400 testdir (400 is 100000000) so r--- --- ---
        
        cd testdir (change directory to testdir)
        -bash: cd: testdir: Permission denied

        chmod 100 stops access to a directory
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Example2:
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        chmod 100 testdir - (100 = 001000000 or --x --- --- so execute rights only)
        
        ls testdir
        ls: cannot open directory testdir: Permission denied
        
        cd testdir - I can't list the director, but I can change to it
        cat file1 - and I can view a file I know exists!
        
        this is a test file
        you have opened it
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I am sure I'll find a use for that? :)
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