Q: Is viruses, trojans and malware a threat to a linux system as in Windows?
问：在Linux系统中象Windows中一样有病毒、特洛伊***和不良线程吗？
A: No, there's a very few viruses to linux and the way a Linux/unix is build up makes it difficult to do any serious damage to the system, in fact I've never heard from people who got their Linux/unix system infected.
答：不，对Linux而言，病毒是非常少的，Linux/Unix的工作方式使得让系统受到损害十分困难。事实上，我几乎没有听到有人说他的Linux/Unix系统被感染了。
Q: So why install a anti-virus application/program?
问：那么为什么要安装防毒应用软件/程序呢？
A: For an ordinary Linux Home user with only one OS system their's no need for Anti-virus, but people who's running network, server or dual booting with win OS this tool can be very handy to scan and delete viruses.
答：对于一般的只使用Linux一种系统的家庭用户而言是不需要防毒软件的，但对于那些使用网络、服务器或用Windows操作系统引导的用户来说，该工具软件可以很方便地扫描和删除病毒。
Q: I'm a home user only running Linux do I need it?
问：我是一个家庭用户，而且只使用Linux操作系统，我需要它吗？
A: No, a firewall is way better as protection like firestarter.
答：不，类似Firestarter之类的防火墙应该是更好的防护方式。
First thing, setup your repositories. Here's how you do it: http://ubuntuguide.org/#extrarepositories
首先 ，设置你的软件库。具体操作请参见：http://ubuntuguide.org/#extrarepositories
Next:
下一步：
Code:
Grab F-prot here and pick the debian/gnu file.
找到F-prot并选择Debian/Gnu文件。
Download XFPROT-1.11 here.
这里下载XFPROT-1.11
Extract xfprot-1.11.tar.gz (eg. right click it and choose extract)
解压缩xfprot-1.11.tar.gz（如：右击并选择解压）
If you meet this output:
如果你看到这样的输出内容：
Choose GTK+-2.6.4 (gives the best look)
选择GTK+ 2.6.4（以得到最好的外观）
and press [1]yes for build with debug statements.
并选[1]yes以获得Debug功能。
Open Menu-Editor:
打开Menu-Editor：
Name: F-Prot
Comment: Protection Application (or what ever you prefer)
Command: xfprot
Icon: /usr/local/xfprot/icons/antivirus-48x48.png
Category: System Tools
To update F-prot:
更新F-prot

http://www.ubuntuforums.org/showthread.php?t=25421