Yes, Linux has virus scanners. Internet consultant A. Lizard tells you why you need one to protect yourself and to protect Windows users to whom you send e-mail.
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While Linux AV is unfashionable, Ive used it for years. While purists will say that its unnecessary due to the separation between user and admin accounts in Linux, I see this as merely raising the barrier for malware entry. There was a time when running an AV on DOS or the original MacOS was seen as a sign of paranoia.