Install the free SSL (autossl) Certificate on the cPanel server's hostname

If you have had a Let's Encrypt or Sectigo SSL expire on your WHM/cPanel server for the server itself. You can manually force a renewal of the AutoSSL/Free Certificate from Let's Encrypt by running the following command, rather than waiting for the nightly cPanel update to run:

/usr/local/cpanel/bin/checkallsslcerts

After a few moments, the system will determine if a new SSL is needed. If it is, it will run through the process of getting a new certificate issued.