Show HN: Linux Doctor – read-only health checks that explain what's wrong

Linux Doctor is a read-only Linux diagnostic tool that runs safe checks, explains what’s wrong in plain English, and provides copy-paste fixes while never modifying the system unless the user explicitly opts in. Each run produces a single most-useful action (START HERE), a health score (0-100) with a trend sparkline, and a diffed history showing what’s NEW, FIXED, or unchanged since the last run. The same checks power a CLI, a web dashboard and a Tauri desktop app; distribution options include npx/npm, AppImage, .deb/.rpm and packaging for immutable distros. Fixes print a dry-run first and require a second opt-in to execute. Checks are extensible via drop-in files and a Pro add-on runs with the user’s privileges.

The tool is designed as a diagnostics doctor, not an always-on monitor: it reads existing system sources (journalctl, systemctl, df, smartctl, etc.) and returns conclusions - what failed, why it matters, and a recommended command to fix it. Findings carry stable IDs and severity levels for reliable history, ignore rules, and actionable evidence. Coverage includes memory, CPU load, disk and inode pressure, filesystem/RAID health, services, certificates, ports, containers, logs, updates, firmware, secure boot/TPM, networking, timers, and more, making it useful for quick triage, pre-bug-report checks, or daily health checks.