Deploy Prometheus to scrape metrics from node_exporter running on each Linux server, then visualize everything in Grafana dashboards showing CPU, memory, disk, network, and systemd service health. The full stack - Prometheus 3.x, node_exporter 1.10, and Grafana 11.6 - can monitor a 10-server homelab on a single Raspberry Pi 4 or a small VM with 1GB RAM. With the community-maintained Node Exporter Full dashboard (Grafana ID 1860), you get production-grade visibility in under 30 minutes of setup time.