https://blog.csdn.net/u010537011/article/details/82317572

unattended-upgraded软件包：自动更新系统软件
sudo apt install unattended-upgrades 安装unattended-upgrades软件

unattended-upgrades配置文件常用配置：
/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{#更新黑名单
    //  "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天下载一次可用更新包
APT::Periodic::AutocleanInterval "2";#每2天删除已安装过的包
ATP::Periodic::Unattended-Upgrade "1"#每1天自动安装可更新的包

无人职守自动更新：（出现错误发邮件给管理员）
/etc/apt/apt.conf.d/50unattended-Upgrades
Unattended-Upgrade::Mail "root@123.com";
Unattendded-Upgrade::MailOnlyError "ture";