Do I need antivirus on a Linux system?

According to the How To Geek, the answer to that is 'No' but with a couple of qualifications, like if you're interacting with a lot of Windows stuff, which can be and is being infected as we speak... But as the man explains, guys like me grab programs for our Windows everywhere we can find them, whereas in Linux, the added programs come from a central Linux distribution point where those have been checked and approved as being free of the bad stuff. There aren't a whole bunch of loose Linux programs out there in cyberspace waiting to be taken, unlike some of those risky ones for Windows. They used to say, "Nobody bothers making malware for a Mac system, because it isn't popular enough." The same goes for Linux but even moreso.  Linux users are even fewer in number than those Mac types, and there's security in that.