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获取免费证书的网址: Certbot

1. 进入你的linux系统,先安装snapd,

yum install snapd

2. 启动snapd

service snapd start

3.安装 Certbot

snap install --classic certbot

注意如下出现此错误时,需要先建立snap 软连接后,再安装certbot

error: cannot install "certbot": classic confinement requires snaps under /snap or symlink from
       /snap to /var/lib/snapd/snap 

ln -s  /var/lib/snapd/snap /snap

4.建立certbot软连接

ln -s /snap/bin/certbot /usr/bin/certbot

5.由于没有将nginx放到环境变量中,设置nginx软连接

ln -s /usr/local/nginx/sbin/nginx /usr/bin/nginx
ln -s /usr/local/nginx/conf/ /etc/nginx

6.最后执行:

certbot --no-redirect