Anyone that knows GDB can quickly pick up Byebug (which essentially is a Ruby version of GDB). Many commands do the same in Byebug and GDB:

  • info breakpoints
  • where
  • break
  • help

Command line options are also pretty similar e.g. -x, etc. Byebug is my favorite Ruby debugger and the default debugger for Rails. A heavy weight alternative is Pry which supports syntax highlighting and other features.