You can find SonarQube initial password from EC2 management console System Log.

• Go to Amazon EC2 console at https://console.aws.amazon.com/ec2/.
• Chose your Instance and Click Actions → Monitor and troubleshoot → Get System log

You can also SSH into your instance and find the login credential using the following command.

$ cat /home/ec2-user/credentials
////////////////////credentials info////////////////////
--- SonarQube
----- User: admin
----- Password : admin
--- PostgreSQL
----- User: sonarqube
----- Password : 1OyoszoecyBlc8rg
////////////////////////////////////////////////////////

Log in to SonarQube.

Login ID: admin

Password: admin

Then you can change an admin password.