“letsencrypt, certbot, certbot-auto, acme.sh” certbot, certbot-auto, acme.sh certbot: recommended by the official website. certbot-auto: no longer supported. acme.sh: 第三方的 acme 协议实现. install certbot almalinux pip 1 2 3 4 5 6 sudo dnf install python3 augeas-libs sudo dnf remove certbot python3 -m venv /opt/certbot/ /opt/certbot/bin/pip install --upgrade pip /opt/certbot/bin/pip install certbot certbot-nginx ln -s /opt/certbot/bin/certbot /usr/bin/certbot archlinux 1 pacman -S certbot ubuntu 1