源的修改：
一、删除企业源:nano /etc/apt/sources.list.d/pve-enterprise.list
注释掉这句：
<p>##deb https://enterprise.proxmox.com/debian/pve bullseye pve-enterprise</p><p> </p>
二、添加PVE官方GPG key：
wget http://mirrors.ustc.edu.cn/proxmox/debian/proxmox-ve-release-6.x.gpg -O /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg
三、添加PVE官方源：
nano /etc/apt/sources.list.d/pve-install-repo.list
deb http://mirrors.ustc.edu.cn/proxmox/debian/pve/dists/ bullseye pve-no-subscription
四、添加Debian官方源并设置为国内阿里云源：
nano /etc/apt/sources.list
deb https://mirrors.aliyun.com/debian/ bullseye main non-free contrib deb-src https://mirrors.aliyun.com/debian/ bullseye main non-free contrib deb https://mirrors.aliyun.com/debian-security/ bullseye-security main deb-src https://mirrors.aliyun.com/debian-security/ bullseye-security main deb https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib deb-src https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib deb https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib deb-src https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib
五、设置Ceph源为国内源：
nano /etc/apt/sources.list.d/ceph.list
deb http://mirrors.ustc.edu.cn/proxmox/debian/ceph-nautilus bullseye main
六、更新软件源并升级系统：
sudo apt update && sudo apt dist-upgrade