Controlling_access_to_files Objectives : - Managing file system permissions Managing default permissions Index Topic Covered 1 Changing file and directory permissions using chmod commandsyntax is --> chmod whowhatwhich file or directorywho is g,u,o,a (group,user,other,all)what is +,-,= (add,remove,exactly)which is r,w,x (read, write, execte)e.g. chmod g+x file1 2 Cotrolling default permissionsEffect of special permissionsDefault permissions (drwxrwxrwx)-(0777)