Hello, I think “localhost.crt” and “localhost.key” files using by Apache and they are mandatory for get a HTTPS certificate. Some tools like "Certbot" need them. If these files deleted then how can I regenerate them? Is below command OK? # openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/pki/tls/private/localhost.key -out /etc/ssl/certs/localhost.crt I found "/usr/libexec/httpd-ssl-gencerts" tool. Is it OK too? The "localhost" is the name of my server? If my server name in "/etc/hosts" file is "my-example.net" then these files name must be "my-example.net.key" and "my-example.net.crt" ? I'm thankful if anyone answer to my questions clearly. Thank you.