Reset lost admin password of Grafana server (CentOS 7)

It could happen to lose your Grafana admin password and luckily there is a pretty easy way to the system administrator of the Grafana server to reset the admin password.
There is really good and simple page of how you can reset the admin password with grafana-cli in the documentation of Grafana website. Probably you can check it, too.

The problem is that most distributions like the one we use (CentOS 7) it rearrange the home directory of the Grafana software and if you try to use grafana-cli you’ll end up with the error mentioned in the section below the solution we offer you here! And you really could mess up the thing and hurry to say this software is buggy!
First, “grafana-cli admin reset-admin-password ” needs to know where is your configuration file and Grafana home directory, because from the configuration it will extract what kind of back-end server you use like sqlite3 or MySQL (or other) and the path or login data if needed to the back-end, then it will reset the password with the given one. At the bottom of this article there is another method of resetting the Grafana admin password without grafana-cli – manual reset in the database.
So first you should check with what command line arguments was started your instance of Grafana server:
Keep on reading!