Linux User Management and Permission Management

This lab is conducted by using Alibaba Cloud ECS. In the lab, ECS runs on Ubuntu 16.04, which is a free open-source GNU/Linux operating system. As one of mainstream operating systems on the market, Ubuntu is a nice choice for users who just begin to use Linux. This lab illustrates the user management and file permission management functions of Linux. You can familiarize yourself with commonly used Linux commands and working principles during the lab, laying a solid fo