grep: Generic Program Information

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1 2.1.1 Generic Program Information
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1 ‘--help’
1      Print a usage message briefly summarizing the command-line options
1      and the bug-reporting address, then exit.
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1 ‘-V’
1 ‘--version’
1      Print the version number of ‘grep’ to the standard output stream.
1      This version number should be included in all bug reports.
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