Reference capture
ssh app.example.com 'uptime; free -h; iostat -xz 1 2; ss -lntp'
Prefer a dedicated SSH jump host and maintenance window for production hosts.
Host telemetry
Linux Observatory
Collect host diagnostics and triage load, memory, I/O, and socket posture before changes.
Command output stays private: all analysis is local and non-networked.
Execution workflow
Observability command set
Severity map
Output interpretation bands
Severe load spikes with no matching process context.
Memory pressure or saturated disks with limited recovery headroom.
Missing one of the expected metric blocks in captured output.
Analyzer
Paste command output
Readiness checklist
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Local findings notebook
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Cross-page references