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Links:
- http://mycodesmells.com/post/watching-metrics-with-prometheus
- https://blog.alexellis.io/prometheus-monitoring/
- https://scot.coffee/2018/12/monitoring-go-applications-with-prometheus/
Paths on Ubuntu 18.04:
/snap/prometheus/21/bin/prometheus --config.file=/var/snap/prometheus/21/prometheus.yml --storage.tsdb.path=/var/snap/prometheus/common