A pure Unix shell script implementing ACME client protocol

* An ACME protocol client written purely in Shell (Unix shell) language.
* Full ACME protocol implementation.
* Support ACME v1 and ACME v2
* Support ACME v2 wildcard certs
* Simple, powerful and very easy to use. You only need 3 minutes to learn it.
* Bash, dash and sh compatible.
* Simplest shell script for Let's Encrypt free certificate client.
* Purely written in Shell with no dependencies on python or the official
  Let's Encrypt client.
* Just one script to issue, renew and install your certificates automatically.
* DOES NOT require root/sudoer access.
* Docker friendly
* IPv6 support

Homepage:
https://acme.sh/
