man, you burst my bubble! anyway, that article and others point out its not just the install base that effects how many viruses there are for it (the majority of servers are linux based apparently, what better reason to write viruses?). the fact that it works quite differently makes it harder to write a virus that will do much damage to linux, oops Linux. talking to my linux friend about it, he was quite pleased i hit the nail on the head when i suggested that since a virus needs to be quite a small packet of code, and it would take much more code to write a malicious virus for linux to any great effect, it could no longer really be a virus (in the same way as the real thing- if the organism had to physically get bigger to do any damage to its host, it could no longer be a virus but something else). therefore it would be much harder to fool people into using it. it certainly wont work as an exe extension, linux doesnt work that way.
you use a mac dont you atom? mac is based on unix and has much the same sort of built in security. i think the big threat for these systems isnt from viruses, but from a bogus program being installed. some sort of hacking of ubuntus servers would have to be done for instance. in ubuntu (and i guess some other linux distros) anything you want is listed in what is called the 'synaptic package manager'. if you need some software, you will normally find it there. downloading from there is a garantee it is safe. if someone were to hack into the servers you download that software from, im guessing they could install a simple bit of code in place of a popular program.
however you would have to reinvigorate 'social engineering' into linux and mac users. most linux users have either become wary through silly experience (like me), or are just more wary anyway, of things like pop ups and spam emails. i saw a good example with my housemate. i cant believe she fell for it. she clicked on a pop up that announced she was the 1 millionth person to visit that site and she had won a free holiday in florida. she happened to be going to cuba anyway so she ended up calling them and was promptly talked out of several hundred dollars through the dodgy holiday guys. all technically legal of course. just that it would now cost her even more to actually use the 'free' holiday'. Why i mention this is that if instead of a holiday hotline there was malicious code, and even though linux prompts for a password anytime you are going to install something, if i unthinkingly did, i might install a command like this: rm -rf /
which apparently will delete all files on the hard drive! as i mentioned before, a VIRUS couldnt do this per se since every time it tries to run it, i will be asked for my password. it also could not send that command out to other computers, so if it cant propagate, it cant be considered a virus either.
ive been thinking about getting a virus scanner for linux, but the consensus on the ubuntu forums is that it is merely a placebo, and that it would be merely scanning for windows viruses anyway. the fact that thousands of people are constantly updating the distro and uploading patches for known exploits, seems to have the same effect anyway...