(Although some HTTP protocol technologies are also explained in the course, the focus of the course is the three-stage operation and maintenance and configuration technology of NGINX, JVM, and Tomcat. The course content includes Nginx advanced basics, Nginx configuration improvement, JVM virtual machine trial, JVM operation and maintenance practical troubleshooting tools, JVM monitoring tools, Tomcat configuration, Tomcat operation and maintenance deployment and other necessary operation and maintenance deployment technologies for Web servers.)