Ubuntu 16.04 Beschädigte Pakete nach Neuinstallation?

Nach der Neuinstallation von Ubuntu 16.04 habe ich beschädigte Pakete und kann die meisten Anwendungen nicht installieren. Ich habe von Synaptic aus versucht, „kaputte Pakete reparieren“, aber es funktioniert nicht. Ein Beispiel;

sudo apt-get install steam

Ausgabe;

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 steam:i386 : Depends: libc6:i386 (>= 2.15) but it is not going to be    installed
          Depends: libstdc++6:i386 (>= 4.3) but it is not going to be installed
          Depends: libx11-6:i386 but it is not going to be installed
          Depends: libudev1:i386 but it is not going to be installed
          Depends: libxinerama1:i386 but it is not going to be installed
          Depends: libtxc-dxtn0:i386
          Depends: libgl1-mesa-dri:i386 but it is not going to be installed
          Depends: libgl1-mesa-glx:i386 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Ein weiteres Beispiel;

sudo apt-get install nvidia-361

Ausgabe;

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nvidia-361 : Depends: lib32gcc1 but it is not going to be installed
              Depends: libc6-i386 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Es gibt keine Ausgabe von;

sudo apt-get clean

Ich habe versucht;

sudo apt-get install -f

Ausgänge;

Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Danke..

Akzeptierte Antwort:

16.04 ist neu und alle Pakete sind nicht auf allen Servern einsatzbereit. Die Verwendung des Hauptservers zum Herunterladen von Paketen löst mein Problem.

1. Systemeinstellungen
2. Software &Aktualisierungen
3. Wählen Sie „Hauptserver“ aus dem Abschnitt „Herunterladen von“ aus

Verwandt:Viele PAM-Authentifizierungsfehler in den Protokollen, die auf den Mailserver abzielen. Wie kann man es stoppen?