Could not resolve 'apt.mopidy.com'

Hi together,

I have updated my Raspberry Pi with the command rpi-update. Now I keep getting the following messages when I run apt-get update!?!

Err http://mirrordirector.raspbian.org jessie InRelease

Err http://mirrordirector.raspbian.org jessie Release.gpg
Could not resolve 'mirrordirector.raspbian.org
Err http://apt.mopidy.com jessie InRelease

Err http://archive.raspberrypi.org jessie InRelease

Err http://archive.raspberrypi.org jessie Release.gpg
Could not resolve 'archive.raspberrypi.org
Err http://apt.mopidy.com jessie Release.gpg
Could not resolve 'apt.mopidy.com
Reading package lists… Done
W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/jessie/InRelease

W: Failed to fetch http://apt.mopidy.com/dists/jessie/InRelease

W: Failed to fetch http://archive.raspberrypi.org/debian/dists/jessie/InRelease

W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/jessie/Release.gpg Could not resolve ‘mirrordirector.raspbian.org

W: Failed to fetch http://apt.mopidy.com/dists/jessie/Release.gpg Could not resolve ‘apt.mopidy.com

W: Failed to fetch http://archive.raspberrypi.org/debian/dists/jessie/Release.gpg Could not resolve ‘archive.raspberrypi.org

W: Some index files failed to download. They have been ignored, or old ones used instead.

I solved the problem.

nameserver from the file /etc/resolv.conf was gone!