FYI: the documentation here is extracted from source file main/ipple.cc.
Automatically save checkpoint file upon exit, regardless of the exit status. Useful for debugging and resuming simulations.
Batch mode. Run non-interactively, suppressing the prompt and disabling tab-completion (from readline or editline). Useful for scripted jobs. Opposite of -i.
Interactive mode. Show prompt before each command. Enable tab-completion if built with readline/editline. Opposite of -b.