(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 contents include the advanced foundation of nginx, the improvement of nginx configuration, the attempt of JVM virtual machine, 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 of web server.)