It would seem, can be considered axiomatic that if a platform has a virus then the antivirus need. But Linux is not so simple. Yes, viruses for Linux exist, but in 99% of cases is the worm, able to exploit a single vulnerability in a particular service and, as a rule, a specific distribution (since the version of the service, configure, and compile options vary from distro to distro).
Also don't forget that virus writers don't sit around, think about Troyan for Linux "Jellyfish".
Usually each manufacturer of anti-virus there is a version for Linux. However, most often this is the version for the mail server, gateway or General file-sharing sites, to protect Windows clients. But recently an increase in the number of anti-virus for Linux desktop. And manufacturers of relevant products scare "arriving exponentially the number malware under Linux". Use or not to use antivirus on the Linux desktop – a personal matter. For me – so while the popularity of Linux on the desktop did not exceed 1-2%, and producers of popular distributions timely release security-updates – nothing to fear. But there are times when you need to check the screw with Windows for viruses or USB flash drive before you give it to someone. In such cases, and can be useful antivirus for Linux.
Why would a normal (not a guru) the user need antivirus in Linux machine?
Many people naively believe that Linux is so safe that the viruses in it simply do not survive, so the antivirus there is no need to install. However, you can name at least 4 reasons antivirus to install:
- Yes, working viruses and Trojans for Linux not as many as for Windows. And the ability of viruses to spread in Linux systems is very limited. But to destroy the contents of the user's home directory the virus is quite capable. Therefore, additional protection will be very helpful.
- Although installing programs from repositories significantly reduces the risk of catching the infection, there are other ways of infection. For example, you can bring the Trojan on the flash drive that was previously connected to the computer in a public place.
- If you have installed a second Windows system, thence viruses can gain access to the Linux section and inject malicious code into a custom and even the system files.
- If you're running services like Samba, viruses can easily enter the disk in a natural way and wait for you out of curiosity launch. In General, and then the antivirus will not interfere.
Personally I never put any antivirus on my laptop. But on my home computer, which houses a lot of the information I needed, I installed Comodo free antivirus. To soothe the soul. Moreover, the configuration of my computer allows you to not care about unnecessary processes in the system. I don't experience slowdowns of the system.
May the Force be with you,