REHASH

The REHASH command triggers the Let's Encrypt™ (ACME) client to acquire and/or install a TLS certificate.

TLS Certificate Renewal
Usage: REHASH

This command is used to initiate the process of obtaining or installing a TLS certificate using the Let's Encrypt™ (ACME) client. It does not currently reload the server's configuration.

(See section 5.2 of RFC 1459, 4.2 of RFC 2812)