Summary of umask permissions

   Octal number		        Access permissions given


        0		        rwx	read, write and
                                        execute

        1		        rw-	read and write
        2		        r-x	read and execute
        3		        r--	read only
        4		        -wx	write and execute
        5		        -w-	write only
        6		        --x	execute only
        7		        ---	no permissions