2. Tails
3. wiki/src/doc/upgrade.*.po
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To check which version of Tails you are currently running, choose **Applications ▸ Tails ▸ About Tails**.

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

In the **About Tails** utility, you can click **Check for Upgrades** to check whether a new version of Tails is available. This check is also done automatically every time you start Tails and connect to the Tor network.

The advantages of this techniqueautomatic upgrades are the following:

The advantages of automatic upgrades are the following:

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

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

A Tails USB stick.

A Tails USB stick

- An Internet connection

An Internet connection

<p>If you cannot upgrade at startup, you can open <i>Tails Upgrader</i>
later by choosing <b>Apps&nbsp;▸ Tails&nbsp;▸ About Tails</b> and clicking
<b>Check for Upgrades</b>.</p>

- If an error occurs while installing the upgrade, *Tails Upgrader* asks you to visit:

If an error occurs while installing the upgrade, *Tails Upgrader* asks you to visit:

If another error occur while upgrading or if your Tails USB stick fails to start after an automatic upgrade, see below how towe recommend that you do a manual upgrade instead. See below.

If another error occur while upgrading or if your Tails USB stick fails to start after an automatic upgrade, we recommend that you do a manual upgrade instead. See below.

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

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, etc.and so on). For example, if you get the following error message:

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

there is not enough free space on the Tails system partition

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

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

<p>You can also do a manual upgrade to reduce the size of future automatic
upgrades, as described [[above|upgrade#reduce]].</p>

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

<p>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.</p>

<p>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.</p>

<p>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.</p>

[[Download and upgrade|doc/upgrade/#download]] (below)

- [[C[[Upgrade by cloning from another Tails|doc/upgrade/#clone]] (below)

[[Upgrade by cloning from another Tails|doc/upgrade/#clone]] (below)

[[Burn a new Tails DVD|install/dvd]]

- Your Tails USB stick

Your Tails USB stick