Identity

Binary: prometheus
Unit: prometheus.service
Config: /etc/prometheus/prometheus.yml
Rules dir: /etc/prometheus/rules/ (glob-referenced from prometheus.yml)
Data dir: /var/lib/prometheus/
Logs: journalctl -u prometheus
Web UI + API: port 9090
Alertmanager: port 9093
Distro install: apt install prometheus / dnf install prometheus (or binary from prometheus.io)

Key Operations

Operation	Command
Status	`systemctl status prometheus`
Check config syntax	`promtool check config /etc/prometheus/prometheus.yml`
Check alerting/recording rules	`promtool check rules /etc/prometheus/rules/*.yml`
Reload config (no restart)	`curl -X POST http://localhost:9090/-/reload` or `sudo systemctl reload prometheus`

Related skills