2 Suppress the welcome message.
5 Run in batch mode. Commands are executed as normal but
6 prompts are not printed.
9 Run in interactive mode. This is the default.
12 Read commands from FILE instead of standard input.
15 Execute COMMAND as if it were entered at the prompt.
16 This option can be specified multiple times.
19 Print a version message and then exit.
22 Print this message and then exit.