Reference Guide

20 Command Line Interface
Help Option
The -h and --help options display general usage information for the utility.
If the argument matches a valid option, the usage information of that option
is displayed. If the option has arguments, the arguments are displayed,
separated by a | character. If the argument does not match a valid option,
a usage error along with the usage information is displayed.
Error Checking and Error Messages
The CCTK utilities check your commands for correct syntax when you
enter them. Unrecognized or invalid options and arguments result in a usage
error that displays the CCTK utility name and version along with the
message.