Understand the System
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.. toctree::
   :hidden:

   man

To understand what might be wrong with a system, one needs to understand how the system **should** behave. This might involve:

 * reviewing designs or specifications
 * re-enforcing your understanding of algorithms or data structures using reference material
 * reading documentation of libraries
 * reviewing comments in code that describe the intention of the code
 * Drawing data structures

You have found the problem when you find actual behaviour that diverges from how the system should behave.

Tips
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* The UNIX man pages are a wealth of information (:ref:`man` )