Hi friends, what's your idea ? I thing If the attacker start attacking to linux, it would possibly to consider linux as vulnerable OS as windows .... many years that they're just breaking windows , isn't it ?

No macs?! O_o, i believe macs have the best security.

well beacause mac has it's own certain users ...

Between the three options, I would say either Linux or Novel. I didn't know Novel made OS, but I know that they're a really secure-oriented company, yet their advertising skills lack. Maybe Linux would be the best. Microsoft, for security, NO WAY!

well , about novel security, I didn't to install to check it's security .... but i thing also it's secure .... here anybody tried novel?

never heared of novel before, is it open source?
I think linux is the most safe Os around at the moment, its open source so bugs are fixed very fast, and not that many people use it so there are almost no virus or spyware writers that target it.

Novell is not open source, however its Linux, a paid version of SUSE.
http://www.novell.com/linux/suse/

I believe it all depends to the conditions when comes to security. Linux, opensource OS, allows people to quickly fix errors, viruses and security holes in quick time. However this does not guarentee the fixture and might make it worst if not don't properly as opensource OS can be edited by anyone. On the other hand, Microsoft is patched by certified engineers and guarentee to work for users. The bad side is Microsoft is working for money and the price might not be cheap. But one can guarentee security with Microsoft for an OS giant.

As long as Linux keep their free and colaborational spirit, there´s no reason why people should hate them (well, maybe Bill Gates) and start attacking linux users. So I think Linux is very safe. Macintosh also... there aren´t too much users of Mac in comparison to Windows users so I suppose it´s more "productive" to make viruses and things like that for Windows. Microsoft policies suck and windows has a lot of bugs, which makes it the best target.

Well, actually - no. An attacker doesn't care if a computer is running on Windows, Linux or some other OS... The only thing that he cares about is to get his hands on the sweet data that lays inside...

Regarding the list, I would add *BSD (FreeBSD, OpenBSD) systems and Sun Solaris (that became open source this year).

Mac’s don't count in this category because Mac’s are pretty expensive as servers, and there is no reason for an attacker to spend a whole day searching for a MAC machine connected to the Internet just to try and compromise it. Besides, there are no needless server applications in MacOS that are turned on, unlike Windows... I once saw my friends computer running a SQL server in the system tray! I asked him what does he need that for? He replied: "I have no idea what is that or what it does! Don't touch it! You might break something!"

Whether you are running Windows, Linux, MacOS, Solaris, FreeBSD or OpenBSD, your computer will ALWAYS be exploitable if you don't configure it properly!

If you set your HDD to be shared in Windows, you are vulnerable.
If you turn on Samba in Linux or BSD (program that allows disk sharing in Windows networks) or don't change the default root password, you are vulnerable...

So, unless you are using Windows, you can rest assured that your system is perfectly secure if you configure it properly. If you are running Windows, run down to Windows Update, disable any server services that you don't need, turn on your firewall, update and activate your antivirus, scan your system with AdAware, don't talk to strangers and your should be just fine too!