update 2016/07/01 6pm: SOLVED. Details here (but DO read anyway the whole post, because the cause of this problem on your computer may still be one of those below!)
The CentOS 6 Linux Server Cookbook is a Packt Publishing title first published in April 2013. You can buy it in paper format (about 370 pages) or as an ePUB or PDF file (black and white only, whereas the ePUB version is in colours). In general I believe, especially in these times of PRISM and widespread economic crisis, that the more people learn how to run their own Free Software servers, the better. I’ve already explained how and, above all, why we should all do this with email and (at least) social networking and online publishing. That’s why, when Packt asked me to review the Cookbook, I accepted.
I’ve discovered Linux in 1995 and I have been using it as my only home/work operating system since then. I still love it and want to continue to use and promote it, but in the last 2⁄3 weeks it’s become almost impossible. In this page I explain why, hoping to get and collect useful suggestions.