wget https://dl.grafana.com/oss/release/grafana-6.2.1-1.x86_64.rpm
sudo yum localinstall grafana-6.2.1-1.x86_64.rpm
sudo service grafana-server start
sudo /sbin/chkconfig --add grafana-server
systemctl daemon-reload
systemctl start grafana-server
systemctl status grafana-server
sudo systemctl enable grafana-server.service