Is my VPS server secure? Steps needed to make it secure, if not?

Question

I'm running on Ubuntu and I'm currently on linode [Disclosure: Referral Link]. I have followed this tutorial and have successfully set up Virtualmin on my linode and its a breeze creating websites and managing domains using the Virtualmin panel:

http://www.propellingsolutions.com/2011/01/how-to-install-virtualmin-on-linode/

However, I'm a little worried about the security of my server. I am not proficient with Linux stuff. SSH is enabled. What steps do I need to take to keep my server safe from hackers and exploiters? Any suggestions would be much appreciated. Thank you.

Answer 1

There's a decent article from linode on this topic: http://library.linode.com/security/basics/

Hope that helps!