Someone

sedde:/home/sedde# apt-get install nvidia-glx nvidia-glx-dev xserver-xfree86
Reading package lists... Done
Building dependency tree... Done
Package nvidia-glx is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package nvidia-glx has no installation candidate
sedde:/home/sedde#