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title: Introduction to Hacking - What is it?
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Linux is a free, open-source UNIX-like operating system. As you continue to learn how to hack, you will realize how important it is to learn how to use the Linux operating system. Need some convincing? Here are a couple facts:

1. Millions of servers on the internet run on the Linux operating system. You must learn the operating system to be able to penetrate these web servers.

2. Some of the best hacking programs only run on Linux.

3. It is lightweight and free.

[Index](/blog/intro_hacking/index)
