I tried using Slackware, 5 years back, when my Linux experience was still at infancy. I remember looking for a Linux distro to install and downloaded Slackware - but had a nightmare installing it and making it work! However, one of the oldest Linux distros, Slackware (now nearly 20 years old, I guess), has come a long way with the latest release, 14.0. It is definitely much easier to use than