Microsoft Debugging Tools for Windows

As already mentioned in the summary it's all about the debugging tools from Microsoft. I was using them to debug dumpfiles stored in the Windows' dump directory with ease. Now I'm using Xubuntu and dunno where to start. Can someone tell me where all these dumpfiles are laid? Does someone know wether to choose on of the debuggers listed here [http://www.thefreecountry.com/programming/debuggers.shtml]? I want everything to be as simple as possible. The things I wanna achieve are the same as with WinDbg maybe doing a stack trace or something like that. I just need to find out why the system or a certain application crashed.

- Thanks!