I learned it from 2 sources: * IN/ix (16 bit UNIX) Documents. The Docs were the old UNIX documents, most were man pages * Later I got Coherent for my 286, th

I learned it from 2 sources: * IN/ix (16 bit UNIX) Documents. The Docs were the old UNIX documents, most were man pages * Later I got Coherent for my 286, the book that came with it was awesome. FWIW, OpenBSD's man pages are very good, much better that what Linux has.