True - Someone implemented it in bash&#x2F;openssl&#x2F;curl&#x2F;sed only.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;lukas2511&#x2F;letsencrypt.sh" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;lukas2511&#x2F;letsencrypt.sh</a>