Linux administration

Let’s Encrypt moves to 64-day certificates in February 2027. Check that renewal, validation, deployment and alerts work across the services you’re responsible for.

Website slowing down during campaigns? Find where requests queue across HTTP/2, NGINX, Apache and PHP-FPM, then test whether a targeted change helps.

GitHub starts enforcing runner versions on August 24, 2026. Audit and upgrade self-hosted runners before builds and deployments start stalling.

Plan a WordPress PHP upgrade before PHP 8.2 support ends. Choose a maintained version, test business-critical workflows and prepare a reliable rollback.