I have always been on the hunt, on and off, for lucid explanations on how to make use of gdb. More often than not, the excitement on landing a link seemingly giving "enough" details would lead to disappointment for want of clarity, depth, etc.
The other day, I just stumbled upon this and thought I'd quickly document this as a reference as we very often have to deal with core-dumps in the MapR world ) like others). I'm sure many of the folks visiting Community will find it useful too.
Have fun exploring and happy learning.