在 CentOS 8 服务器上安装 Certbot 启用 HTTPS

sudo dnf install epel-release
sudo dnf upgrade

sudo yum install snapd
sudo systemctl enable --now snapd.socket
sudo ln -s /var/lib/snapd/snap /snap

# 检查系统是否已经安装了 Certbot 包
dnf list installed | grep certbot
# or 在CentOS7上
yum list installed | grep certbot
# If you have any Certbot packages installed using an OS package manager like apt, dnf, or yum, you should remove them before installing the Certbot snap to ensure that when you run the command certbot the snap is used rather than the installation from your OS package manager.
sudo dnf remove certbot
# or
sudo yum remove certbot

sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot

# Either get and install your certificates...
sudo certbot --nginx
# Or, just get a certificate
sudo certbot certonly --nginx

sudo certbot renew --dry-run
# The command to renew certbot is installed in one of the following locations:
/etc/crontab/
/etc/cron.*/*
systemctl list-timers