I am coming from ubuntu. In Mac i notice that multiple browser windows or finder windows don't show up independently in task bar or task switcher. This is causing problems in many operations.
Is there any switch to activate ungrouped windows?
Windows – how to ungroup windows on mac
switchingwindows
Related Solutions
Welcome, Martijn.
I always recommend Apple's videos: http://support.apple.com/videos/#macos
For now I would also recommend you not worry about terminal/UNIX. Learn to use the Mac OS using the GUI at first, getting used to how it behaves and in which ways it might be different from the Windows operating systems you are used to.
Good luck!
EDIT: Also, it doesn't really matter where things "should" go on a Mac. You can put applications on the desktop, documents in Applications, etc, etc. Although I don't recommend that. There is a Documents folder for documents and an Applications folder for apps. Treat the Library and System folders with care (IE -- do not go into them or manipulate them until/unless you know what they are, what's inside and what the effect of your actions will be) and you will be fine. Backups are also your best friend.
Anything involving the multi-touch track pad is going to be different, since that is an OS X feature. Including the double finger gesture to scroll back or forward.
In fact that feature works so seamlessly in Safari for Mac that that's one of the reasons I might switch to Safari from Chrome. It integrates beautifully with all the latest features of OS X.
Best Answer
I believe that you should try to adapt to a different workflow:
Note: this is not the apostrophe key, it's the backtick key.
Non-shifted tilde ~ left of z on a UK keyboard, left of 1 on US.
System Preferences → Trackpad → More Gestures → App Exposé to configure your preferred gesture.
Press F10
I understand this is not a precise answer to your question, but I believe that switching from Win/Linux to Mac OS, involves some adaptation.