Local host
sudo cert/clientRenew
When the certbot script asks you to provide verification, go to remote host
Remote host
sudo cert/vpsRenew ACME_FILE ACME_VALUE
The script waits for Return key, now go to local host and press Return to let certbot generate certificate and key
Local host
Press Return
Remote host
Press Return
Local to remote
Copy certificate and key to the remove host
Restart Nginx