Originally Posted by lebabyg
The main reason that viruses do not exist for linux (so i was told by my comp sci housemate) is because of the architecture of the system not being as fundamently flawed as windows (ie having to chose to run as root). Therefore it makes sense for malicious programmers to design something to exploit the more open and more widely used system. That said though, linux/unix is becoming more and more accessible to the end/home-user and because of this viruses for linux probably will become more common place. Maybe it's worth having a virusscanner like avg just to keep ahead??
Also, in Windows you know that almost everyone browses with IE, reads email with Outlook Express, uses MSN as their, well, MSN client...etc. So to make a successful virus you make it exploit one of those knowing that everyone uses them. With Linux, there are loads of browsers, Links, Lynx, Opera, Firefox, Konqueror, Epiphany, Galeon... ditto with email clients. So making a virus that propogates successfully is harder still.