删除企业源或者注释掉里面的源
rm -rf /etc/apt/sources.list.d/pve-enterprise.list
添加国内源
echo “deb http://mirrors.ustc.edu.cn/proxmox/debian/pve buster 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：
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main contrib non-free
或者
echo “deb http://mirrors.ustc.edu.cn/debian buster main contrib
deb http://mirrors.ustc.edu.cn/debian buster-updates main contrib
deb http://mirrors.ustc.edu.cn/debian-security buster/updates main contrib” > /etc/apt/sources.list
pve_ceph设置国内源
原配置文件：/etc/apt/sources.list.d/ceph.list
echo “deb http://mirrors.ustc.edu.cn/proxmox/debian/ceph-nautilus buster main” > /etc/apt/sources.list.d/ceph.list
最后更新缓存使得更改生效
apt update
更新全部软件包版本（此时包含PVE）
apt dist-upgrade
然后重启系统生效
之后建议运行下
apt autoremove
删除旧的安装程序释放占用硬盘空间