ClamAV

[chrs80]

Should I bother installing ClamAV?

[arnav803]

First of all ubuntu is based on linux and as we know there is very little chance for a linux virus to infect or create havoc in a system as ubuntu is open-source os developer from all around the world test ubuntu and if a security flaw or something like that is found it is fixed by them.So if you contact only with Ubuntu and Linux around you then i don't think you essentially need that but it does help you to scan pen drives hard drives for windows viruses so you can delete them and stop further spreading of malwares.

[BBQdave]

Should I bother installing ClamAV?

Sure, if you want to be nice to friends that have Windows' machines

This Thread might be of interest to you.

[wsxadf]

I always loved this thread http://ubuntuforums.org/showthread.php?t=510812.
It tells very well about security.

[Frogs Hair]

See my signature regarding security.

[Jaraxle]

I use it with a SATA/IDE USB adapter to scan drives and it works well. Also, I'm not positive but I think I once infected a Windows machine by passing along a Windows virus from files that were stored in linux so it can be a good thing to use, esp. in a mixed-enviornment.