If you run the Linux operating system, you have likely encountered the iptables firewall. This is for good reason, as iptables provides an effective means to control who talks to your Linux system over a network connection and how they do it. In the vast uncontrolled network that is the Internet, attacks can herald from just about any corner of the globe—even though the perpetrator might physically be located in the next state (or the next room). If you run a networked Linux machine, your system is at risk of being attacked and potentially compromised every second of every day.

学习研究讨论华为网管服务器安装指南，适用于初级接触者

教程很简短，但是实用，适用广，可以一看。共计45页。

测试or开发，都需要搭建一套属于自己的测试环境。而操作系统首选Linux系统，其中CentOS 7.9是使用最多的Linux版本；本课程以CentOS 7.9为例，带着大家一起安装使用CentOS 7.9系统；主要内容：VMWare创建Linux虚拟机、设置Linux虚拟机选项、安装Linux系统、安装Linux客户端、远程连接Linux系统、上传文件到Linux系统、从Linux系统下载文件到本地。通俗易懂，人人都可以掌握。 课程地址：https://edu.csdn.net/course/detail/35816

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