apt-get: Install package with specific version and hold it on the next upgrade

If you need to install specific version of the package in your system, you can list all available package versions with the command:

apt-cache madison varnish

After you know the package version you can install it with:

sudo apt-get install varnish=4.0.2-1

To hold the package on the selected version during the next upgrade:

sudo apt-mark hold varnish

You can also "unhold it" with:

sudo apt-mark unhold varnish