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The format for running the hello
program is:
hello option ...
hello
supports the following options:
- `--help'
-
- `-h'
-
Print an informative help message describing the options and then exit.
- `--version'
-
- `-v'
-
Print the version number of
hello
on the standard error output
and then exit.
- `--traditional'
-
- `-t'
-
Use the traditional greeting message `hello, world' rather
than the more modern `Hello, world!'.
- `--mail'
-
- `-m'
-
Print your mail on the standard output.
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