Learning and playing with Unix systems has been my passion since I used to hack them by wardialing in the nineties. Then I made that the base of my profession, I mean, working, hacking and playing with them, not wardialing.I learnt a lot when I was employed at Krypton Networks: We had to build all it up by ourselves with no help rather than a few old unix manuals.Then, when I was at IBM, I had the opportunity to learn serious business with IBM's AIX Unix and their particular world of RS/6000, Power, fiber storage cabinets, etc. PTF patching, microcode upgrading, Message Queues, TN3270 screens, LVM and those things.At the same time I ran several online and offline businesses: a web hosting company, a worldwide electronics trading platform, small networks and services for SOHOs, etc.My personal hi-tech related projects are:Cryptocurrency research: development of crypto trading tools. Payment gateways.Secure networks research: VPN, Tor, i2p.Free and open networks expansion (with EXO NGO and guifi.net).Building applications with LSLP, the Least Suitable Language Paradigm (© me). I.E. an online MUD game in Cobol or an ERP in PHP (oh wait!).Setting up (and taking care of) a retrocomputer room with Amigas, Commodore64, Spectrums, Amstrad 464, Atari and 8 & 16 bit video game consoles.