配置 Ubuntu 定期自动安装安全更新

sudo apt-get install unattended-upgrades
sudo dpkg-reconfigure -plow unattended-upgrades

/etc/apt/apt.conf.d/50unattended-upgrades

Unattended-Upgrade::Allowed-Origins {
        "${distro_id}:${distro_codename}";
        "${distro_id}:${distro_codename}-security";
//      "${distro_id}:${distro_codename}-updates";
//      "${distro_id}:${distro_codename}-proposed";
//      "${distro_id}:${distro_codename}-backports";
};

// 更新后自动重启设备
Unattended-Upgrade::Automatic-Reboot "true";
Unattended-Upgrade::Automatic-Reboot-Time "04:00";

APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Unattended-Upgrade "1";