unattended-upgraded軟體包：自動更新系統軟體
sudo apt install unattended-upgrades 安裝unattended-upgrades軟體

unattended-upgrades配置檔案常用配置：
/etc/apt/apt.conf.d/50unattended-upgrades
Unattended-Upgrade:Allowed-Origins {
    "${distro_id}:${distro_codename}";##通用更新
    "${distro_id}:${distro_codename}-security";##安全性更新
    "${distro_id}ESM:${distro_codename}";##拓展性更新
}
Unattended-Upgrade::Package-Blacklist{#更新黑名單
    //  "vim";
    //  "libc6";
};
/etc/apt/apt.conf.d/10periodic
APT::Periodic::Update-Package-Lists "1";#每1天更新一次索引
APT::Periodic::Dounload-Upgradeable-Packages "1";#每1天下載一次可用更新包
APT::Periodic::AutocleanInterval "2";#每2天刪除已安裝過的包
ATP::Periodic::Unattended-Upgrade "1"#每1天自動安裝可更新的包

無人職守自動更新：（出現錯誤發郵件給管理員）
/etc/apt/apt.conf.d/50unattended-Upgrades
Unattended-Upgrade::Mail "