Hi, newbie here. I've been reading up on rootkits (via Google), but there's so much on detection and removal and hardly anything, if at all on how they get into a computer. So...how DO they get into a computer? Is it as easy as, say, clicking on a link, clicking on a link that leads to a pop-up ad, a pop-up ad somehow getting past your browser defenses, or accidentally going to a site marked as red by WOT - and you're still in danger even if you get out of suspicious sites quickly? I know viruses find it hard to survive in Linux, but is it different for rootkits? Say, once they enter, they can punch a hole straight into your root account? How much of a threat do they pose in the Linux community (are new rootkits being created every year, say? Or are they as rare as Linux viruses?)?