Ok, I'm a linux noob, I make no secret of that.... However, I am computer savvy - and make no secret of that either.

Now, on virtually all Windows based PC's (and I know linux most certainly is NOT windows) you have a firewall monitoring external communication ports and then you have an Antivirus, monitoring internally changes to the filesystem and hueristics of applications as they run in the background.

Linux being open source, and pardon my naivety if appropriate, does it suffer from viruses...??? Surely there are some malicious code-kiddies out there frantically scrabbling on their keyboards trying to code something that will bring the world of credit to it's knees, if only it run linux on the servers...???

So, my question is this... Is there not some kind of linux based AV that can be ported onto the phone to safeguard against unauthorised access to filesystem and changes thereof?

As stated previously, I am a linux noob and haven't got the faintest idea if this is a naive statement so please, no flame wars!