apt update && apt install -y curl wget sudo
W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/proxmox/debian bullseye InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DD4BA3917E23BF59
E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/proxmox/debian bullseye InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
apt-get install gnupg2
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys DD4BA3917E23BF59
apt update && apt install -y curl wget sudo
apt update && apt full-upgrade
apt install proxmox-ve postfix open-iscsi
echo "deb https://mirrors.tuna.tsinghua.edu.cn/proxmox/debian buster pve-no-subscription" > /etc/apt/sources.list.d/pve-install-repo.list