Do Linux hosting servers need anti-virus?

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http://www.linuxandlife.com – Having your datacenter audited at the office can be a painful experience. One of the toughest is known by the initialism “PCI”, which stands for Payment Card Industry. The PCI audits are in-depth, and require several layers of security, logging, and documentation. Unfortunately, many of the requirements of such audits are derived from a Windows centric environment, and make little sense in a pure Linux system. At the top of this list is the requirement for anti-virus to be installed on all servers, but how necessary is this precaution in real life? A couple of my coworkers and (Distributions)