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Linux

Linux server scripts, tools and guides for AlmaLinux, Rocky Linux, Ubuntu and Debian: hardening, firewalls, databases, mail and monitoring.

Harden SSH AlmaLinux 9: Secure Setup in 15 Minutes

Keys only, root locked down, a non-standard port that does not break SELinux, and rate-limiting that stops the log spam. Every step is safe to apply on a live server if you keep one session open.

September 29, 2026

MySQL Health Snapshot Script: Free 10-Second MariaDB Check

One page of the numbers that matter on a MariaDB or MySQL server: connections vs limit, buffer pool hit ratio, tmp tables on disk, slow queries, largest tables, leftover MyISAM and anything running longer than five seconds. Read-only.

September 29, 2026

SSL Expiry Check Script: Free Network Test for Web and Mail

Checks the live TLS certificate on any list of hosts — web, mail with STARTTLS, or every domain on a cPanel server — and warns before they expire. One line per host, cron-friendly exit codes.

September 29, 2026

Free website test

Is your website set up right?

Check SSL, security headers, redirects, robots.txt, sitemap, llms.txt and security.txt in one test. It takes about 30 seconds.