Vi/Vim is a one of the most frequent

代码说明：

Vi/Vim作为linux下最常用的编辑器，是在linux系统下工作的人必不可少的工具，掌握其基本命令就很重要。-Vi/Vim is a one of the most frequent-used editor,and it is a necessary tool for people who work under linux-system,so it is very important to master the basic commands.