How to change directory permissions in Linux with 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. chmod a-w file (removes all writing permissions) chmod o+x file (sets execute permissions for other (public permissions)) chmod u=rx file (Give the owner rx permissions,

hot777 apk, 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..