400 read by owner
200 write by owner
100 execute (and directory search) by owner
700 read, write, and execute (and directory search) by owner
040 read by group
020 write by group
010 execute (and directory search) by group
070 read, write, and execute (and directory search) by group
004 read by others
002 write by others
001 execute (and directory search) by others
007 read, write, and execute (and directory search) by others