Use
Usage messages are often a quick way to learn (or remember) how to use a shell-based command without reading the documentation or seeking help. Functionalities previously unknown can also be discovered this way. The usage message may sometimes be the only available documentation for the program.
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Famous quotes containing the word use:
“... it is use, and use alone, which leads one of us, tolerably trained to recognize any criterion of grace or any sense of the fitness of things, to tolerate ... the styles of dress to which we are more or less conforming every day of our lives. Fifty years hence they will seem to us as uncultivated as the nose-rings of the Hottentot seem today.”
—Elizabeth Stuart Phelps (1844–1911)