NVIDIA Jetson Nanoのセキュリティ対策
Ubuntuの自動アップデートを設定します。
再起動が必要な際は、指定した時間で再起動するように設定します。
自動アップデートの結果をメール送信するように設定します。
「unattended-upgrades」をインストールと有効化
「unattended-upgrades」をインストールします。
sudo apt install -y unattended-upgrades
インストールした「unattended-upgrades」を有効化します。
以下のコマンドを実行し、表示される画面で<Yes>を選択します。
sudo dpkg-reconfigure -p low unattended-upgrades
<Yes>を選択します。
「unattended-upgrades」設定
利用する設定ファイルは、以下の２つのファイルとなります。
- /etc/apt/apt.conf.d/20auto-upgrades ： 自動アップデートとアップグレードを設定。
- /etc/apt/apt.conf.d/50unattended-upgrades ：詳細設定
「20auto-upgrades」設定
- APT::Periodic::Update-Package-Lists "1";
アップグレードの確認間隔
Daily=1 / Every two days = 2 / Weekly = 7 / Every two weeks = 14 / Never = 0 - APT::Periodic::Download-Upgradeable-Packages "1"
セキュリティーアップデートがある場合の動作
Download and install automatically = 1 / Download automatically = 1 / Display immediately = 0
APT::Periodic::Update-Package-Lists "1"; APT::Periodic::Unattended-Upgrade "1";
「50unattended-upgrades」設定
以下の設定変更を加えました。
- Unattended-Upgrade::Mail "aaa@bbbl.com";
メール通知先の設定 - Unattended-Upgrade::MailOnlyOnError "true";
メール通知のタイミングをエラー発生時のみに変更 - Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
未使用となったカーネル関連パッケージの自動削除 - Unattended-Upgrade::Remove-Unused-Dependencies "true";
未使用となったパッケージの自動削除(apt-get autoremove) - Unattended-Upgrade::Automatic-Reboot "true";
自動再起動が実施されるように設定(自動再起動ON) - Unattended-Upgrade::Automatic-Reboot-Time "02:00";
再起動時の時間を指定
// Automatically upgrade packages from these (origin:archive) pairs
//
// Note that in Ubuntu security updates may pull in new dependencies
// from non-security sources (e.g. chromium). By allowing the release
// pocket these get automatically pulled in.
Unattended-Upgrade::Allowed-Origins {
"${distro_id}:${distro_codename}";
"${distro_id}:${distro_codename}-security";
// Extended Security Maintenance; doesn't necessarily exist for
// every release and this system may not have it installed, but if
// available, the policy for updates is such that unattended-upgrades
// should also install from here by default.
"${distro_id}ESMApps:${distro_codename}-apps-security";
"${distro_id}ESM:${distro_codename}-infra-security";
// "${distro_id}:${distro_codename}-updates";
// "${distro_id}:${distro_codename}-proposed";
// "${distro_id}:${distro_codename}-backports";
};
// List of packages to not update (regexp are supported)
Unattended-Upgrade::Package-Blacklist {
// "vim";
// "libc6";
// "libc6-dev";
// "libc6-i686";
};
// This option will controls whether the development release of Ubuntu will be
// upgraded automatically.
Unattended-Upgrade::DevRelease "false";
// This option allows you to control if on a unclean dpkg exit
// unattended-upgrades will automatically run
// dpkg --force-confold --configure -a
// The default is true, to ensure updates keep getting installed
//Unattended-Upgrade::AutoFixInterruptedDpkg "false";
// Split the upgrade into the smallest possible chunks so that
// they can be interrupted with SIGTERM. This makes the upgrade
// a bit slower but it has the benefit that shutdown while a upgrade
// is running is possible (with a small delay)
//Unattended-Upgrade::MinimalSteps "false";
// Install all unattended-upgrades when the machine is shutting down
// instead of doing it in the background while the machine is running
// This will (obviously) make shutdown slower
//Unattended-Upgrade::InstallOnShutdown "true";
// Send email to this address for problems or packages upgrades
// If empty or unset then no email is sent, make sure that you
// have a working mail setup on your system. A package that provides
// 'mailx' must be installed. E.g. "user@example.com"
//Unattended-Upgrade::Mail "root";
Unattended-Upgrade::Mail "aaa@bbb.com";
// Set this value to "true" to get emails only on errors. Default
// is to always send a mail if Unattended-Upgrade::Mail is set
//Unattended-Upgrade::MailOnlyOnError "true";
Unattended-Upgrade::MailOnlyOnError "true";
// Remove unused automatically installed kernel-related packages
// (kernel images, kernel headers and kernel version locked tools).
//Unattended-Upgrade::Remove-Unused-Kernel-Packages "false";
Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
// Do automatic removal of new unused dependencies after the upgrade
// (equivalent to apt-get autoremove)
//Unattended-Upgrade::Remove-Unused-Dependencies "false";
Unattended-Upgrade::Remove-Unused-Dependencies "true";
// Automatically reboot *WITHOUT CONFIRMATION*
// if the file /var/run/reboot-required is found after the upgrade
//Unattended-Upgrade::Automatic-Reboot "false";
Unattended-Upgrade::Automatic-Reboot "true";
// If automatic reboot is enabled and needed, reboot at the specific
// time instead of immediately
// Default: "now"
//Unattended-Upgrade::Automatic-Reboot-Time "02:00";
Unattended-Upgrade::Automatic-Reboot-Time "02:00";
// Use apt bandwidth limit feature, this example limits the download
// speed to 70kb/sec
//Acquire::http::Dl-Limit "70";
// Enable logging to syslog. Default is False
// Unattended-Upgrade::SyslogEnable "false";
// Specify syslog facility. Default is daemon
// Unattended-Upgrade::SyslogFacility "daemon";
// Download and install upgrades only on AC power
// (i.e. skip or gracefully stop updates on battery)
// Unattended-Upgrade::OnlyOnACPower "true";
// Download and install upgrades only on non-metered connection
// (i.e. skip or gracefully stop updates on a metered connection)
// Unattended-Upgrade::Skip-Updates-On-Metered-Connections "true";動作確認
以下のコマンドで、動作確認を実施しておきます。
$ sudo unattended-upgrade --dry-run --debug
