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default -- Options understood by most GNU utilities.
Each program also understands the following informational options:
- -u
- --usage
- Display a short usage message and exit. 
 
- -h
- --help
- Display help message and exit. 
 
- -L
- --license
- Display GNU General Public License and exit. 
 
- -v
- --version
- Display program version and exit.