Commande

Commandes:
apt-get update # obtient la nouvelle liste des paquets disponibles

apt-get upgrade --dry-run # mise à jour en mode test (sans modification)
apt-get upgrade # mise à jour du système

apt-get install nomPaquet # installe un paquet

Fichiers:
/etc/apt/sources.list  # liste des dépôts de paquet disponible (repository list)

Bugs (wheezy)

W: There is no public key available for the following key IDs: 7638D0442B90D010 7638D0442B90D010 9D6D8F6BC857C906

apt-get install debian-archive-keyring

Bugs (sid)

2018-02-13

apt-get upgrade
...
Preparing to unpack .../sound-theme-freedesktop_0.8-2_all.deb ...
Unpacking sound-theme-freedesktop (0.8-2) ...
dpkg: error processing archive /var/cache/apt/archives/sound-theme-freedesktop_0.8-2_all.deb (--unpack):
 trying to overwrite '/usr/share/sounds/freedesktop/index.theme', which is also in package freedesktop-sound-theme 0.7.dfsg-1
dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/sound-theme-freedesktop_0.8-2_all.deb

Solution:

# commande vue sur https://askubuntu.com/questions/176121/dpkg-error-trying-to-overwrite-file-which-is-also-in
dpkg -P freedesktop-sound-theme

# redémarrage de l'installation
apt --fix-broken install