help - get help

  help [command | all]

  When entered with no argument, a list of all currently available crash
  commands is listed.  If a name of a crash command is entered, a man-like
  page for the command is displayed.  If "all" is entered, help pages
  for all commands will be displayed.  If neither of the above is entered,
  the argument string will be passed on to the gdb help command.