[CentOS] Slightly OT: How to learn UNIX -- The Rosetta Stone for UNIX

> Hi,
>
> 	I was wondering what would be the best way to learn AIX, Solaris, or
> HP-UX, for someone who knows Linux very well?  Books?  Courses?
> Self-teaching in a home lab?

Hello,

  here's an interesting resource, though more on the "surviving guide" side ;-)
http://www.bhami.com/rosetta.html