By default, Grafana refers to the config location at /etc/grafana/, which even has a default LDAP configuration, along with saved dashboards and data sources under the provisioning directory. Even importing of JSON dashboards is possible; they are saved here. So based on our flexibility, we can customize it accordingly.
You can start the Grafana service using service grafana-server start.
By default, it creates admin and admin as the username and password and then gives you the ability to change them.