AntiVirus Software is used to remove a Virus from a system. This is less needed for Linux systems directly but is useful particularly for when you are serving Windows clients.
ClamAV is probably the best known OpenSource AntiVirus Software. http://www.tianjinpump.com http://www.xianwahl.com http://www.yipu.com.cn/shangjia/info7.html http://www.yipu.com.cn/shangjia/info3.html http://www.b-mailbox.com
3 pages link to AntiVirus: