When starting Tails, [[set up an administration password|doc/first_steps/welcome_screen/administration_password]].
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<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>
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InstallingExamples of additional usefulsoftwarepackages
Choose <span class="menuchoice"> <span class="guimenu">Applications</span> ▸ <span class="guisubmenu">To see which packages are installed automatically every time you start Tails, choose **Apps ▸System Tools</span> ▸ <span class="guimenuitem">Synaptic Package Manager</span></span>Additional Software**.
<p>The packages included in Tails are carefully tested for security. Configuring additional APT repositories might break the security built into
Tails. Band 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>
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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:
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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 persistencefeature 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`: