I&#x27;ve recently switched from Windows to Linux, and I feel kind of &quot;naked&quot;, because I don&#x27;t know what is the Linux equivalent of Windows Firewall + NOD32 + Common Sense. I&#x27;ve got ufw and AppArmor installed so far. Is using such a huge hosts file a common practice? Also, what about Flash? I don&#x27;t want to install it, but some websites insist on it still. What would you advise, folks? I&#x27;d appreciate any suggestions.