1、更换PVE国内源

# 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

2、添加debian国内源

nano /etc/apt/sources.list.d/pve-install-repo.list
#添加以下内容
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

3、更新pve

apt update&& apt upgrade -y