set hostname
# sudo su
# set-hostname Prometheus
Download Prometheus
# apt update
# cd /opt
# curl -L -O https://github.com/prometheus/prometheus/releases/download/v2.28.0-rc.0/prometheus-2.28.0-rc.0.linux-amd64.tar.gz
# tar -xf prometheus-2.28.0-rc.0.linux-amd64.tar.gz
# rm -rf prometheus-2.28.0-rc.0.linux-amd64.tar.gz
# mv prometheus-2.28.0-rc.0.linux-amd64/ prometheus
# cd prometheus/
setup with systemd file
# vim /etc/systemd/system/prometheus.service
# systemctl enable prometheus
# systemctl start prometheus
# systemctl status prometheus