Hi @Sunday ,
Welcome to SonarSource Community! 
Our documentation site, which has the links to the sonar scanner is down (see here for more info). You can use our binaries website to access it for now:
- For sonar-scanner-cli: Index of /Distribution/sonar-scanner-cli
- For sonar-scanner-msbuild: Index of /Distribution/sonar-scanner-msbuild
Let me know if those links don’t work for you or if you are looking for something else.
Joe