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
Read the output
$ promtool query instant http://localhost:9090 'rate(labapp_http_requests_total[1m])' | head -n 1 {code="200", instance="127.0.0.1:8000", job="labapp", method="GET", path="/"} => 1.05 @[1792644627.758] $ promtool query instant http://localhost:9090 'sum without (method, instance) (rate(labapp_http_requests_total[1m]))'