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AppArmor is an effective and easy-to-use Linux application security system. AppArmor proactively protects the operating system and applications from external or internal threats, even zero-day attacks, by enforcing good behavior and preventing even unknown application flaws from being exploited.

AppArmor security policies completely define what system resources individual applications can access, and with what privileges. A number of default policies are included with AppArmor, and using a combination of advanced static analysis and learning-based tools, AppArmor policies for even very complex applications can be deployed successfully in a matter of hours.



AppArmor is more used for the server system where security is the top priority, in my opinion you don't need it to configure a secure system for home desktop, and it usually causes more problems than advantages so, it's better to disable it for the home used computer but make sure you atleast run a firewall which is more useful.

Open up the terminal Application > Accessories > Terminal and type following command

sudo /etc/init.d/apparmor stop
sudo update-rc.d -f apparmor remove