Hi all,

I am a newbie to Linux. I am finding it interesting but i am wondering why Linux is not having any Antivirus or some security tools? wont this pose any security threat when we are accessing Internet?

There are Linux antivirus products. There are just far fewer Linux antivirus programs when compared with antivirus programs for Windows. There are a few reasons for this:

• Virus writers want attention. Since most people that interact directly with the OS interact with Windows, why not make a virus to infect Windows since you will annoy the most people?
• Stereotypically, a larger proportion of Windows users are vulnerable to making mistakes that allow viruses to infect their system when compared to Linux users.
• Windows is more vulnerable to attack. This is a very debatable topic, but it is widely believed that there are more exploitable holes in Windows than there are for viruses.
• It is also argued that potential holes are found and patched in Linux versions faster than in Windows versions because of the fact that more people look at, analyze, and test the actual code that builds Linux distros and much of the software that runs on them. This is due the the fact that most of Linux software is open and able to be viewed by anyone.

It should be noted that while Linux doesn't suffer from most of the software considered to be viruses, there are still large batches of software that "infect" Linux machines. The worst kind of software to get on a Linux machine is a rootkit. Rootkits allow someone to gain top-level system access and control while not alerting the actual users of the system that anything has changed. These rootkits can modify and spy on data or run programs in the background without any of the processes or data accesses appearing to the legitimate users. The fact that another user logged into or is still logged into the machine could also be completely hidden. Other kinds of malicious software and data that can find its way on Linux machines are loggers, poisoned DNS entries, backdoor botnets, harvesters, spam gateways, etc.

As you can see, Linux machines are not free from security concerns. The main difference between security on a Windows machine and security on a Linux machine is how you keep a high level of security. In Windows, you want to make sure that you have a strong firewall, observant antivirus, thorough antispyware/adware, and careful eye on what to watch for on your system. With a Linux machine, you want to configure a tight firewall, run nightly updates (up2date, etc) to ensure that critical patches are installed and software is updated, ensure that all unnecessary daemons and programs are disabled and locked away, and that all code added to the system is secure and monitored for abnormal behavior/use. The differences mainly stem from the fact that most Windows machines are used as desktop productivity or gaming machines while most Linux machines are used as different types of servers (web, email, DNS, proxy, FTP, IRC, etc).

also there may be a lack of linux viruses but linux mail servers etc... can give windows viruses to windows clients

Actually as far as I know, most of the people who use Linux or depend on it are a little more introduced to computing and had already been a victim of a virus attack more than once on a Windows Machine. So they
know the loopholes and are less susceptible to virus attacks.

Linux just has a lot less viruses. I use linux and don't give a crap about an antivirus.

Another reason why virus writers write for Windows, is they aren't open source, and in the hacker community, they can tell others that they did this on a non-open source operating system. ALso, since Linux is open source, the holes are patched within a few hours - days.

there are alot more people trying to find exploits in Windows Os's than there are for any other OS type. FireFox is a good example, people thought it was way more secure than Internet Explorer untill it became super popular, now exploit finders are finding the same kind of issues with FF

Another consideration is the amount of 'STUFF' bundled with windows unlike *nix which is very modulated, the more there is the more there is to go wrong.

There is no need of any antivirus on the Linux os for more information plz visit

http://linuxera.com/content/view/106/1/

jay

Believe nothing of what you hear, and only half of what you see!

Some of the points the others have made are very valid, however my advice would be...... be cautious of any software that you utilize over the network.

As linux gains in popularity, it also presents a challenge to the writers of malicious code and their evil intentions!

Dont live in a 'fools paradise', they also have linux in their sights!
Only problem is, there are so many distro's, they dont know where to start...lol!

Regards to all!

I think we stablished that already.