Tails includes an automatic mechanism to upgrade a USB stick to the latest version of Tails. When an automatic upgrade is performed, only an upgrade package is downloaded. The upgrade package contains all the changes made to Tails since Tails was first installed or was last manually upgraded.

In some cases, it is impossible to do an automatic upgrade and you might have to do a manual upgrade. This page describes both techniques.

Your Persistent Storage will be preserved by both automatic and manual upgrades.

If you use Tails from a DVD, you need to burn a new DVD.

  1. Checking which version of Tails you are currently running
  2. Automatic upgrade using Tails Upgrader
    1. Troubleshooting
  3. Manual upgrade using Tails Cloner
    1. Download and upgrade
    2. Upgrade by cloning from another Tails

Checking which version of Tails you are currently running

To check which version of Tails you are currently running, choose Applications ▸ Tails ▸ About Tails.

Automatic upgrade using Tails Upgrader

After starting Tails and connecting to Tor, Tails Upgrader automatically checks if upgrades are available and then proposes you to upgrade your USB stick. The upgrades are checked for and downloaded through Tor.

The advantages of automatic upgrades are the following:

  • You only need a single Tails USB stick. The upgrade is done on the fly from a running Tails. After upgrading, you can restart and use the new version.

  • The upgrade is much smaller to download than a full USB image.

  • The upgrade mechanism includes cryptographic verification of the upgrade. You don't have to verify the USB image yourself anymore.

需求：

  • A Tails USB stick

  • An Internet connection

After connecting to Tor, if an upgrade is available, a dialog appears and proposes you to upgrade your USB stick.

如果要進行昇級，請點擊 立即昇級, 然後依照昇級過程的指示操作

如果你無法自啟動時更新 (例如在離線的狀況下 ), 你可以在終端器下打開 Tails Upgrader ，然後執行以下指令：

tails-upgrade-frontend-wrapper

Troubleshooting

If an error occurs during the upgrade, the assistant proposes you to read one of the following pages:

If your Tails USB stick fails to start after an automatic upgrade, see below how to do a manual upgrade.

Manual upgrade using Tails Cloner

It might not always be possible to do an automatic upgrade as described above. For example, when:

  • No automatic upgrade is available from our website for this version.

  • The automatic upgrade is impossible for technical reasons (not enough memory, not enough free space on the USB stick, and so on). For example, if you get the following error message:

     there is not enough free space on the Tails system partition

  • The automatic upgrade failed and you need to repair a Tails USB stick.

  • You want to upgrade by cloning from another Tails USB stick which is already up-to-date, for example, when working offline or with a slow Internet connection.

After connecting to Tor, a dialog informs you if you have to upgrade your USB stick using Tails Cloner to a newer version of Tails.

You can also do a manual upgrade to reduce the size of future automatic upgrades.

When doing automatic upgrades, the size of the download increases over time. If you do a manual upgrade, the size of future automatic upgrades will become smaller again.

We estimated that, to actually reduce the overall download size, it's only worth it to do 1 manual upgrade every year if you apply all upgrades of Tails.

To do a manual upgrade, you can either:

Download and upgrade

You need:

  • Your Tails USB stick

  • Another empty USB stick (at least 8 GB) Why?

  • ½ hour to download Tails ( 1.5 GB )

  • ½ hour to upgrade

It is currently impossible to manually upgrade a Tails USB stick while running from itself. This scenario requires creating an intermediary Tails on another USB stick, from which to upgrade your Tails.

See our instructions on how to do a manual upgrade by:

Downloading and upgrading from Windows might be less secure if your Windows has viruses. But, it might be more convenient and faster.

Upgrade by cloning from another Tails

If you know someone you trust who already did the upgrade, you can upgrade your Tails by cloning from their Tails.

You need:

  • Your Tails USB stick

  • Another up-to-date Tails (USB stick or DVD)

  • ¼ hour to upgrade

See our instructions on how to do a manual upgrade by: