You usually don't need a virus program with Linux. Technically it may be possible for a virus to attack linux but they are extremely rare so far. Virus programs can be installed, but my understanding is they would mostly look for windows viruses.
In his book “Online!” John Dvorak (American technology columnist), says that “Linux cannot be absolutely immune to viruses. Even if Linux’s non-susceptibility seems to be absolute there is no guaranteeing that tomorrow…someone won’t find a tiny hole to push an elephant through. ”
That is all.
Which is why I said "usually".
Nobody is making guarantees for the future.
Currently viruses and the like as a threat to linux is miniscule in comparison to windows, phishing etc.
