command-line argument

command-line argument
   A parameter that alters the default mode of a command. In many operating systems, a commandline argument is one or more letters or numbers preceded by the / (slash) character. In Unix, a command-line argument may be called an option or a flag and is usually a single character preceded by a hyphen (as in -r). With some commands, you can group several switches. Sometimes called a command-line switch.
   See also command line.

Dictionary of networking . 2014.

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