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Linux is a Unix-like operating system that runs on servers and desktop systems. The kernel, currently at 3.9, is based on Linux 3.8, released in February.

The 3.9 kernel has been rewritten for improved performance and support for hardware-accelerated encryption, including new drivers for Intel and AMD processors.

Linux is not vulnerable to the same types of attacks that Windows is. Linux has no drivers for Microsoft Windows, and Microsoft Windows security updates are not available for Linux.

Linux also has different vulnerability mechanisms and is not vulnerable to all types of attacks.

Linux is also a Unix-like operating system, which means that it can use a firewall to protect it from attacks. A firewall can protect Linux from attacks from the outside world, and it can also protect Linux from attacks from other computers on the same network.