Topics
Security
Data formats
Text
Linux and network
Encoding and conversion
Where to start
First steps
15 stages · From system basics and command input to navigation, files, text, and pipelines.
Track map 12 tracks · 132 stages
Difficulty
New labs
Sections 186 articles
Command index 436
Popular
Observability: metrics, alerts, logs
Several correct answers
promtool check config /etc/prometheus/prometheus.yml
sudo systemctl reload prometheus
promtool check rules /etc/prometheus/rules/disk.yml
amtool check-config /etc/prometheus/alertmanager.yml