安装snap

• snap工具安装官方文档
• CentOS7安装示例

yum  -y install epel-release
yum -y install snapd
systemctl enable --now snapd.socket
ln -s /var/lib/snapd/snap /snap
snap install core
snap refresh core

安装certbot

• certbot使用和安装官方文档
• CentOS7安装示例

snap install --classic certbot
ln -s  /snap/bin/certbot  /root/certbot