[root@vps ~]# mkdir acme
[root@vps ~]# cd acme
[root@vps acme]# wget https://github.com/acmesh-official/acme.sh/archive/master.tar.gz
[root@vps acme]# tar zxvf master.tar.gz
acme.sh-master/
acme.sh-master/.github/
[root@vps acme]# cd acme.sh-master/
[root@vps acme.sh-master]# ./acme.sh --install --nocron
[jeu. nov.  4 21:37:30 CET 2021] It is recommended to install socat first.
[jeu. nov.  4 21:37:30 CET 2021] We use socat for standalone server if you use standalone mode.
[jeu. nov.  4 21:37:30 CET 2021] If you don't use standalone mode, just ignore this warning.
[jeu. nov.  4 21:37:30 CET 2021] Installing to /root/.acme.sh
[jeu. nov.  4 21:37:30 CET 2021] Installed to /root/.acme.sh/acme.sh
[jeu. nov.  4 21:37:30 CET 2021] Installing alias to '/root/.bashrc'
[jeu. nov.  4 21:37:30 CET 2021] OK, Close and reopen your terminal to start using acme.sh
[jeu. nov.  4 21:37:30 CET 2021] Installing alias to '/root/.cshrc'
[jeu. nov.  4 21:37:30 CET 2021] Installing alias to '/root/.tcshrc'
[jeu. nov.  4 21:37:30 CET 2021] Good, bash is found, so change the shebang to use bash as preferred.
[jeu. nov.  4 21:37:31 CET 2021] OK

À ce stade, le client est installé dans /root/.acme.sh/ et nulle part ailleurs.

• https://blog.tetsumaki.net/articles/2017/06/generation-des-certificats-lets-encrypt-par-challenge-dns-avec-le-client-acmesh.html
• https://www.howtoforge.com/getting-started-with-acmesh-lets-encrypt-client/
• https://www.palabritudes.net/2018/03/11/certbot-challenge-dns-gandi-ovh.html
• https://smallstep.com/blog/the-embarrassing-state-of-enterprise-acme/

clients

• https://letsencrypt.org/fr/docs/client-options/
• https://blog.keychest.net/acmev2-clients
• https://opensourcelibs.com/libs/acme-client