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3. wiki/src/doc/persistent_storage/additional_software.*.po
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Browse locally with the <span class="application">*Synaptic Package Manager</span>*:

Browse locally with the *Synaptic Package Manager*:

When starting Tails, [[Sset up an administration password |doc/first_steps/welcome_screen/administration_password]] when you start Tails.

When starting Tails, [[set up an administration password|doc/first_steps/welcome_screen/administration_password]].

<p>The packages included in Tails are carefully tested for security.
Installing additional packages might break the security built into Tails, so be
careful with what you install. For
example, installing OpenVPN might modify the firewall rules that Tails uses to
force network traffic to go through Tor.</p>

<p>The packages included in Tails are carefully tested for security.
Installing additional packages might break the security built into Tails. For
example, installing OpenVPN might modify the firewall rules that Tails uses to
force network traffic to go through Tor.</p>

InstallingExamples of additional useful software packages

Examples of additional useful software

Installing additional software

Installing additional software

Installing additional software automatically when starting Tails

Installing additional software automatically when starting Tails

ITo installing an additional softwarpackage automatically when starting Tails
:

To install an additional package automatically when starting Tails:

InstallUsing additional software

Using additional software

Checking your list of additional software

Checking your list of additional software

Choose <span class="menuchoice"> <span class="guimenu">Applications</span>&nbsp;▸ <span class="guisubmenu">To see which packages are installed automatically every time you start Tails, choose **Apps&nbsp;▸ System Tools</span>&nbsp;▸ <span class="guimenuitem">Synaptic Package Manager</span></span>Additional Software**.

To see which packages are installed automatically every time you start Tails, choose **Apps&nbsp;▸ System Tools&nbsp;▸ Additional Software**.

Removing additional software

Removing additional software

InstallUsing a*Additional sSoftware
*:

Using *Additional Software*:

Configuring additional APT repositories (for advanced users)

Configuring additional APT repositories (for advanced users)

<p>The packages included in Tails are carefully tested for security.
Configuring additional APT repositories might break the security built in to
Tails.
B and might install software that has not even been approved by Debian. Be even more careful
with what you install.</p>

<p>Configuring additional APT repositories might break the security built into
Tails and might install software that has not even been approved by Debian. Be even more careful
with what you install.</p>

Create an <span class="filename">*apt-sources.list.d</span>* folder in your pPersistent volumStorage:

Create an *apt-sources.list.d* folder in your Persistent Storage:

Edit <span class="filename">As root, edit */live/persistence/TailsData_unlocked/persistence.conf</span>*, the configuration of the pPersistent volume, as root and add the <span class="filename">Storage, and add the *apt-sources.list.d</span>* folder as a persistence feature of type `link`:

As root, edit */live/persistence/TailsData_unlocked/persistence.conf*, the configuration of the Persistent Storage, and add the *apt-sources.list.d* folder as a feature of type `link`:

Write your additional `sources.list` files in the <span class="filename">apt-sources.list.d</span> folder. For example, to add
the `non-free` sections of Debian 10 (Buster3 (Trixie), backports, and security
updates, you can create a file named <span class="filename">
*/live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list</span>*
with the following content:

For example, to add
the `non-free` sections of Debian 13 (Trixie), backports, and security
updates, you can create a file named
*/live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list*
with the following content:

File names must end with
<span class="filename">.list</span> *.list* and mayust only contain the following
characters: letters, digits, underscore, hyphen, and period.

File names must end with *.list* and must only contain the following
characters: letters, digits, underscore, hyphen, and period.

Correct the ownership and permissions of your additional `sources.list` files to be owned by `root` and only readable by others. For example:, execute the following commands.

Correct the ownership and permissions of your additional `sources.list` files to be owned by `root` and only readable by others. For example, execute the following commands.