Could not update the cache of APT - cannot fetch YNH updates

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bonjour à toutes/tous :slight_smile:
J’ai le même problème, j’ai donc essayé en ligne de commande :

sudo apt update

j’ai ce message d’erreur :confused:

Err:1 http://apt.armbian.com buster InRelease
  Temporary failure resolving 'apt.armbian.com'
Err:2 http://security.debian.org buster/updates InRelease                                               
  Temporary failure resolving 'security.debian.org'
Err:3 http://deb.debian.org/debian buster InRelease                                                     
  Temporary failure resolving 'deb.debian.org'
Err:4 http://forge.yunohost.org/debian buster InRelease             
  Temporary failure resolving 'forge.yunohost.org'
Err:5 http://deb.debian.org/debian buster-updates InRelease
  Temporary failure resolving 'deb.debian.org'
Reading package lists... Done    
Building dependency tree       
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease  Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease  Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://security.debian.org/dists/buster/updates/InRelease  Temporary failure resolving 'security.debian.org'
W: Failed to fetch http://apt.armbian.com/dists/buster/InRelease  Temporary failure resolving 'apt.armbian.com'
W: Failed to fetch http://forge.yunohost.org/debian/dists/buster/InRelease  Temporary failure resolving 'forge.yunohost.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.

dans l’admin web j’ai :

Récupération des mises à jour disponibles pour les paquets du système...
W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease Temporary failure resolving 'deb.debian.org'
W: Failed to fetch http://security.debian.org/dists/buster/updates/InRelease Temporary failure resolving 'security.debian.org'
W: Failed to fetch http://apt.armbian.com/dists/buster/InRelease Temporary failure resolving 'apt.armbian.com'
W: Failed to fetch http://forge.yunohost.org/debian/dists/buster/InRelease Temporary failure resolving 'forge.yunohost.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.
Des erreurs se sont produites lors de la mise à jour du cache APT (gestionnaire de paquets Debian). Voici un extrait des lignes du fichier sources.list qui pourrait vous aider à identifier les lignes problématiques :
sources.list:deb http://deb.debian.org/debian buster main contrib non-free sources.list:deb http://deb.debian.org/debian buster-updates main contrib non-free sources.list:deb http://security.debian.org/ buster/updates main contrib non-free sources.list.d/armbian.list:deb http://apt.armbian.com buster main buster-utils buster-desktop sources.list.d/yunohost.list:deb http://forge.yunohost.org/debian/ buster stable

merci pour l’aide :slight_smile: