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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.
type: Bullet: '1. '
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.
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Execute the following command.
Esegui il comando seguente.
<p class="command">sudo apt clean</p>
<p class="command">sudo apt clean</p>
Configuring additional APT repositories (for advanced users)
 
<p>The packages available in Debian are
submitted to public scrutiny.</p>
<p>I pacchetti disponibili in Debian sono
sottoposti a scrutinio pubblico.</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>
<p>Configurare repository APT supplementari potrebbe compromettere la sicurezza del tuo
Tails e potrebbe causare l'installazione di programmi che non sono stati approvati da Debian. Fai ancora più attenzione
a ciò che installi.</p>
<p>This step is usually not needed to install additional software and might be necessary
only in very rare occasions.</p>
<p>Questo passaggio di solito non è richiesto per installare programmi aggiuntivi e potrebbe rendersi necessario
solo in occasioni molto rare.</p>
Sometimes, you might need to configure additional APT repositories. For example, to install packages from the `non-free` section of Debian. To do so:
A volte, potresti aver bisogno di configurare dei repository APT supplementari. Ad esempio per installare pacchetti dalla sezione `non-free` di Debian. Per fare questo:
Create an *apt-sources.list.d* folder in your Persistent Storage:
 
<p class="command">sudo install -d -m 755 /live/persistence/TailsData_unlocked/apt-sources.list.d</p>
<p class="command">sudo install -d -m 755 /live/persistence/TailsData_unlocked/apt-sources.list.d</p>
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`:
 
/etc/apt/sources.list.d source=apt-sources.list.d,link
/etc/apt/sources.list.d source=apt-sources.list.d,link
Write your additional `sources.list` files in the *apt-sources.list.d* folder.
 
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:
Ad esempio, per aggiungere
le sezioni `non-free` di Debian 13 (Trixie), dei backport e degli aggiornamenti di sicurezza,
puoi creare un file chiamato
/live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list
con il contenuto seguente:
deb tor+http://ftp.us.debian.org/debian/ trixie non-free
deb tor+http://security.debian.org/ trixie-security non-free
deb tor+http://ftp.us.debian.org/debian/ trixie-updates non-free
deb tor+http://ftp.us.debian.org/debian/ trixie-backports non-free
deb tor+http://ftp.us.debian.org/debian/ trixie non-free
deb tor+http://security.debian.org/ trixie-security non-free
deb tor+http://ftp.us.debian.org/debian/ trixie-updates non-free
deb tor+http://ftp.us.debian.org/debian/ trixie-backports non-free
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.
Correggi il proprietario e i permessi del tuo file `sources.list` supplementare in modo che il suo proprietario sia `root` e il file sia in sola lettura per gli altri. Ad esempio:
<p class="command">sudo chown root:root /live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list</p>
<p class="command">sudo chown root:root /live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list</p>
<p class="command">sudo chmod 644 /live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list</p>
<p class="command">sudo chmod 644 /live/persistence/TailsData_unlocked/apt-sources.list.d/non-free.list</p>
Restart Tails to apply the changes.
Riavvia Tails per applicare le modifiche.

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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.
Correggi il proprietario e i permessi del tuo file `sources.list` supplementare in modo che il suo proprietario sia `root` e il file sia in sola lettura per gli altri. Ad esempio:
11/13/2025
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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.
11/13/2025
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String information

Source string description
type: Bullet: '1. '
Unit identifier
757111
String age
11/13/2025
Last updated
11/13/2025
Source string age
11/13/2025
Translation file gettext PO file
wiki/src/doc/persistent_storage/additional_software.it.po, string 125