Linux permissions: An introduction to chmod

chmod 777 The chmod command allows users to change read and write permissions in Unix systems. This guide covers how to use chmod to view and modify these permission on. Thus, 777 (111 111 111) is all permissions for everyone, while 700 (111 000 000) is all permissions only for the owner. Other combinations are also common: 666 (110 110 110) is

pt777, I'm trying to change the permissions of temp_dir to 777. Why are these commands not accomplishing that? I'm using Linux by the way..