Program debugging

``Using the command line interface of debug'' and ``Using the graphical interface of debug'' contain information regarding the symbolic debugger debug, which allows you to use the symbolic names in your program to pinpoint where a problem has occurred. You can run your program under control of debug to see what the program is doing up to the point at which it fails. Alternatively, you can use it to examine a core image file left by a program that failed. ``Using the command line interface of debug'' contains information on the Command Line Interface (CLI) debugger, along with a tutorial. ``Using the graphical interface of debug'' contains information on the Graphical User Interface (GUI) debugger, along with a tutorial.