It is well known that cyber security is a very important issue, and the server is the most critical link in network security.
Linux is considered to be a secure Internet server as an open source operating system. Once there is a security vulnerability in the Linux system, volunteers from all over the world will patch it. However, system administrators often do not get information in time and correct, which gives hackers. However, more security issues relative to these system itself, more security issues are caused by improper configuration, and can be prevented by appropriate configuration. The more services running on the server, the more opportunities in the improper configuration, the greater the possibility of security issues. Here
