Learning Unix

'Learning Unix' is a little open-ended? Exactly in what context? It's highly unlikely you'll be doing system administration - perhaps shell programming? Depending on the info. the Uni gives you of course...
 
How different is the Unix to Linux operating systems without KDE or Gnome on top? The commands are similar in my experience, is it the way the kernel operates or disk structures?
 
How different is the Unix to Linux operating systems without KDE or Gnome on top? The commands are similar in my experience, is it the way the kernel operates or disk structures?

lol, ls and cd are the same.

Remeber, The 2 OSs will seem similar at the command line if they both use bash. AIX's default of korn shell is almost impossible to use if you aren't used to vi control keys.

The big differences are procedural at a really low level.
 
Linux uses the GNU userland utilities. Sun uses their own which frequently have different functionality and arguments/syntax. If you're familiar with the GNU syntax it can be frustrating until you get used to what the different utilities use.
 
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