system health checks

Learn to build intelligent, low-noise system health checks in Bash that self-tune with EMA baselines, correlate CPU/memory/I/O wait/network/disk growth/temps/SMART before alerting, and emit human+JSON output. Includes a ready script, minimal optional deps, 3–5 step setup via cron/systemd, tuning and webhook/email hooks—portable across servers, containers, and edge as a lightweight alternative to heavy monitoring.

Learn to build intelligent, baseline-aware server health checks in pure Bash, avoiding noisy static thresholds and heavy agents. Install minimal tools, track CPU, normalized load, memory, rootfs, failed units, ping and I/O, learn rolling baselines via Welford’s algorithm, alert with z-scores plus guardrails, return clear exit codes, automate with cron/systemd, and extend to SMART, sensors, service checks and webhook/email notifications.