The strengthening of the Linux operating system security configuration instructions

We all know, network security is a very important issue, and the server is a network security key.

Linux is considered a safer Internet server as an open-source operating system, Linux system security vulnerabilities are found, the Internet from all over the world, volunteers are eager to fix it. However, administrators often fail to timely and correct information, it will give a hacker to exploit. Relative to these vulnerabilities of the system itself, more security problems are caused by incorrect configuration, you can pass the appropriate configuration to prevent.