Defensive Linux utilities
Make safer infrastructure decisions.
Fast, explainable checks for Linux administrators. Your input stays in this browser.
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Local processingConfigurations and logs are analyzed on your device and are never uploaded.
Tools
fstab InspectorValidate mounts and boot risks›NFS Entry BuilderGenerate resilient mount entries›sshd ValidatorReview SSH hardening controls›Permission InspectorExplain octal permissions›systemd Unit BuilderCreate safer service units›Log TriageSurface high-signal incidents›CIS Quick CheckTrack a baseline hardening score›Docker Compose ValidatorCatch container security risks›Server Resource SizerEstimate a sensible baseline›Cron ExplainerValidate and explain schedules›RPC Health CheckerProbe JSON-RPC endpoints from your browser›Blockchain Node Sizing CalculatorEstimate hardware for a blockchain node›Linux Node PreflightGenerate a read-only diagnostic script›Validator Log AnalyzerFind failure patterns in node logs›
01
Local processing
Configurations and logs are analyzed on your device and are never uploaded.
02
Explainable output
Every warning includes a concrete reason, so you keep control of the final decision.
03
Methodology
Server-side validation was performed on Ubuntu 24.04 LTS (arm64). The tools are deterministic browser-side functions; distribution labels describe the environments the documentation targets. Formal compliance on other distributions requires running the official benchmark tooling there.