atop

Advanced system monitor

low risk

interactive breakdown — edit the command and press Explain
$ 
What it does

Process and resource monitor with history.

Examples
atop -r /var/log/atop/atop_20250101Replay a day · explain & risk-check →
Related
sar
Open the full explainer →More in Debugging & Performance

Reference text is hand-written and may be incomplete — check man atop for your version. Test destructive commands on a non-production system first.