目前Proxmox中文社区源已正式提供镜像服务，镜像更新频率为每10小时，镜像站机房存放在法国巴黎online机房使用阿里云、华为云融合提供国内CDN加速服务。 地址 http://download.proxmox.wiki
删除企业源
rm -rf /etc/apt/sources.list.d/pve-enterprise.list
下载秘钥
wget http://download.proxmox.com/debian/proxmox-ve-release-6.x.gpg -O /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg
添加社区源
echo "deb http://download.proxmox.wiki/debian/pve stretch pve-no-subscription" >/etc/apt/sources.list.d/pve-install-repo.list
建议同时使用国内debian源，修改/etc/apt/sources.list文件，添加如下内容：
echo "deb http://mirrors.aliyun.com/debian/ buster main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster main non-free contrib
deb http://mirrors.aliyun.com/debian-security buster/updates main
deb-src http://mirrors.aliyun.com/debian-security buster/updates main
deb http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib" > /etc/apt/sources.list最后执行apt update
apt update && apt dist-upgrade #如需升级pve，则执行该命令