Je ne peux plus faire des mises à jour

[Salim]

Bonjour j'ai cette erreur lorsque j'essaie de mettre à jour, ce problème est apparu après que j'ai essayé d'installer Signal ; Veuillez noter que je suis nouveau à Linux depuis exactement un jour. Je me demande si vous avez une solution à ce probeleme car je ne peux plus faire de nouvelle commande sur le Terminal et je ne peux pas lancer les mises à jour

===========================
Install Updates Error Log
===========================

Install Updates could not fetch the package cache information lists.
Go to https://www.linuxliteos.com/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

E: Des valeurs entrant en conflit ont été renseignées pour l'option Signed-By à propos de la source https://updates.signal.org/desktop/apt/ xenial: /usr/share/keyrings/signal-desktop-keyring.gpg !=
E: La liste des sources ne peut être lue.

[stevef]

Apologies for responding in English.

Welcome.

What instructions did you follow to install signal ?
Can you provide a link we can check ?

If you have only been using Linux for one day, the quickest solution is probably to begin again with a fresh installation.

[Salim]

Apologies for responding in English.

Welcome.

What instructions did you follow to install signal ?
Can you provide a link we can check ?

If you have only been using Linux for one day, the quickest solution is probably to begin again with a fresh installation.

I was using the steps available on this link: 

https://signal.org/download/#

Code:

# NOTE: These instructions only work for 64-bit Debian-based
# Linux distributions such as Ubuntu, Mint etc.
# 1. Install our official public software signing key:
wget -O- https://updates.signal.org/desktop/apt/keys.asc | gpg --dearmor > signal-desktop-keyring.gpg
cat signal-desktop-keyring.gpg | sudo tee /usr/share/keyrings/signal-desktop-keyring.gpg > /dev/null
# 2. Add our repository to your list of repositories:
echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main' |\
  sudo tee /etc/apt/sources.list.d/signal-xenial.list
# 3. Update your package database and install Signal:
sudo apt update && sudo apt install signal-desktop

[stevef]

Your error messages indicates your system may have conflicting values for verifying the signal software. It is not obvious how this could have happened from those instructions.

We can try to sort the problem out, but debugging over a forum can be complex, slow and is not guaranteed to work.
The quickest option may be to begin again with a fresh installation, so if you wish to try that, let us know.

To try debugging the existing install please follow the suggestions below.

1) Did you notice any error messages while running the install instructions ?
2) Did you try any other methods to install the signal application ?
3) Try to verify that the install instructions worked as expected.

Open a terminal by pressing Ctrl Alt and T keys together.  In the new window, enter the commands below.
Copy and paste the results back in the thread.

This command will show the keys installed

Code:

ls -l /usr/share/keyrings/

This command will check that the key downloaded for signal is readable.

Code:

file /usr/share/keyrings/signal-desktop-keyring.gpg

This command will show repositories to check the signal got added in the expected place

Code:

ls -l /etc/apt/sources.list.d/

This command will show the contents of the signal file which may hold the conflicting signing information reported by the update/upgrade.

Code:

cat /etc/apt/sources.list.d/signal-xenial.list