![](https://media.journoportfolio.com/users/23537/images/09cb4b58-0bb8-46dc-866e-e08eea78bdf0_max-600.jpg)
Get Recognized for Mentoring With the AIX Badge Program
Back in the day, when Christopher Lang started UNIX®, the only reference or learning materials available were costly vendor-facilitated training courses, the paper version of the manual that came with the server hardware, and if you could find a decent book shop, it was the odd generic UNIX paperback.