Here on __Vultr__, we have the option to enable __IPv6__ on all deployable VPSes. But with this, some programs and commands may prefer one or the other with unpredictable results. In this guide, we will configure `apt-get` to use only __IPv4__ or __IPv6__. This guide targets Ubuntu 14.04 and Debian Jessie, but may work for newer versions as well. If you want to force the apt-get to use IPv4 or IPv6 only one time, follow these steps. This feature is available after the `0.9.7.9~exp1` versio......