What Does Command Line Option Mean?
Command-line options are commands used to pass parameters to a program. These entries, also called command-line switches, can pass along cues for changing various settings or executing commands in an interface.
Techopedia Explains Command Line Option
The syntax of command-line options differs from one operating system to another. In MS-DOS/Windows, by convention, a command-line option is indicated by a letter prefixed with a forward slash.