http://certbot.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/fa/glossary
Some DNS providers can help you create Let’s Encrypt certificates (including wildcard certificates) easily using Let’s Encrypt’s DNS validation method, including by providing a software interface that Certbot can use for updating DNS records automatically. Operating System The operating system is the core software running on a computer. The most common operating systems are Windows, macOS, and Linux. Linux is subdivided into “distributions” like Ubuntu, Debian, RedHat, and many more.