Go to the Jenkins dashboard and select the Manage Jenkins link.
From the Manage Jenkins page, select the Manage Plugins link. Click the Available tab and search for the Sonar plugin. Click the checkbox next to the Sonar plugin link and click the Install without restart button.
Once the installation is complete, you will see a Success indicator as you see here. You will do this for other plugins. When we cover Versioned Configuration, you will learn how to be sure that all of these configuration changes - such as installed plugins - can be versioned with virtually every change to the CI server infrastructure.