Linux AntiVirus: Avast
A query from a reader has prompted me to make Avast! Linux Home Edition the first antivirus package I evaluate on my desktop. This requires a free registration to get a license key, which is good for one year. You can get a new license key each year.
The system requirements are minimal: glibc version 2.1 or higher, 486 or better CPU, and 32 MB of RAM. A quick check at Distrowatch reveals that every version of Debian Linux since 3.0 meets the glibc requirement (as does every version of Ubuntu).
Since I'm using Debian, I downloaded the .deb package. I would expect this to work on any Debian-derived distribution (e.g. Ubuntu, Mepis, Mint) but I have not tried this. For Fedora I'd use the .rpm package, and for systems not using .rpm or .deb there's a .tar.gz archive.