cpanel server software

There are a few potential reasons why your cPanel/WHM and website may be inaccessible. At first glance, it sounds like one of the components of your website isn't running. You'll want to ensure that your web server, database, PHP (if applicable), and cPanel are all up and running. The exact command for this will depend on which distro you're running, but as a starting point, ss -tulpn will show you which ports are open and have listening services on them. If any of the services aren't running, you'll need to manually start them and troubleshoot any errors that prevent the services from starting. You may also want to check your logs for your web server, database, PHP, and cPanel for errors.