Locate the database file grafana.db. It should be somewhere in /var/lib/grafana.
Connect to the database. $ sqlite3 /path/to/grafana.db
Check for admin login. sqlite> select * from user;
Update the user’s password. update user set password = '59acf18b94d7eb0694c61e60ce44c110c7a683ac6a8f09580d626f90f4a242000746579358d77dd9e570e83fa24faa88a8a6', salt = 'F3FAxVm33R' where login = 'admin';
*The password is “admin”.
Yes it works after I extend the disk space as well.
My first attempt was failed because of insufficent disk space, after sorting that out and all is good now, thanks.