Around 2000 or so, I used to work in tech support for a software company who had like 5000 Windows-based customers and 5 running Solaris. My boss chose me to learn Solaris when the previous “expert” left. I bought this book and started hacking. Good times!
This is the only one I know.
Hahaha. And they say the internet is only for porn.
That is only one corner of it.