What security measures should I take after installing Ubuntu?

It's good to stay vigilant! Regularly check for rootkits or suspicious activity on your system. Just keep it simple with common sense precautions.

To be honest, most people don’t need extreme measures against hacking on Linux unless you've got something specific to protect. Unlike Windows, Ubuntu doesn’t expose your system as much. Just make sure your ports are properly managed and open only what’s necessary.

If your goal is anonymity, try to limit your presence on social media even more, and consider using alternative operating systems like Whonix for better privacy. Keeping your accounts minimal is a solid step.

You probably don't need antivirus software like on Windows. Just enable 'ufw'—the uncomplicated firewall on Ubuntu. It's pretty straightforward to set up. You can read up on it, and I think you’ll be good to go!

You really just need to activate 'ufw' for basic protection. It acts like the firewall on a Mac, controlling what apps can connect. If you like having that pop-up alert for new connections, you might not find 'ufw' quite the same, but it does keep your system secure.