Also if you're using linux desktop and connecting or trading files with Windows machine, it wouldn't hurt to have an antivirus program installed.
I've never had a virus on my linux machines since the mid 1990s, but I've never had one on my Windows machines either. Well once, my teenage son did get one visiting porn sites. I've never ran a virus scanner on linux but did try ClamAV just to see how it ran.
Greetings. Friends, Romans & Netizens, lend me your eyes!