Linux Shout published a tutorial about installing SonarQube on Ubuntu 20.04 LTS Server.
Install SonarQube on Ubuntu 20.04 LTS Server
Steps to install Sonarqube Sofware testing platform on Ubuntu 20.04 or 18.04 LTS Linux server to analyze the code quality
Install SonarQube on Ubuntu 20.04 LTS Server - Linux Shout