CaddyServer 的安装非常简单，几行命令即可搞定。
Debian, Ubuntu, Raspbian 安装
$ sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
$ curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/cfg/gpg/gpg.155B6D79CA56EA34.key' | sudo apt-key add -
$ curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/cfg/setup/config.deb.txt?distro=debian&version=any-version' | sudo tee -a /etc/apt/sources.list.d/caddy-stable.list
$ sudo apt update
$ sudo apt install caddy
Fedora, RedHat, CentOS 安装
Fedora 或者 RHEL/CentOS 上打开终端，输入以下命令
$ dnf install 'dnf-command(copr)'
$ dnf copr enable @caddy/caddy
$ dnf install caddy
这样就安装好了，访问 IP 地址即可看到 Caddy 默认页面