Ubuntu Blocking Packages from update

 https://askubuntu.com/questions/18654/how-to-prevent-updating-of-a-specific-package

dpkg

Put a package on hold:

echo "<package-name> hold" | sudo dpkg --set-selections

Remove the hold:

echo "<package-name> install" | sudo dpkg --set-selections

Display the status of your packages:

dpkg --get-selections

apt
Hold a package:
sudo apt-mark hold <package-name>
Remove the hold:
sudo apt-mark unhold <package-name>
Show all packages on hold:
sudo apt-mark showhold