Users Guide

22 CCTK Options
Case Sensitivity
• Command line options, pre-defined and user-defined arguments,
and filenames given as arguments are all case sensitive.
• Unless specified otherwise, enter all commands, options, arguments,
and command line switches in lowercase letters.
Command Line Option Delimiters
• Single-character options are prefixed with a preceding hyphen (-).
• Multi-character options are
prefixed with two (2) preceding hyphens (--).
Example: utilname -o --option
Table 4-2 lists some examples of valid and invalid CCTK command lines.
optionX Generic multi-character designation for a utility name, where X can
be used to distinguish multiple options used in the same command
line instance.
argX Generic designation for an argument, where X can be used to distinguish
multiple arguments used in the same command line instance.
[mandatory
option]
Generic designation for a mandatory argument.
<string> Generic designation for a string.
<filename> Generic designation for a filename.
[ ] Indicates a component of the command line. Enter only the
information within the brackets, not the brackets themselves.
... Indicates that the previous argument can be repeated several times in
a command. Enter only the information, not the ellipsis (...) itself.
| Separates mutually exclusive choices in a syntax line. For example:
numlock: Turns the keyboard number lock on or
off.
Arguments: on | off
Enter only one choice: --numlock=on, --numlock=
off
Table 4-1. Command Line Syntax (continued)
Element Description