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The general synopsis of the
grep command line is
grep options pattern input_file_names
There can be zero or more options. pattern will only be seen as such (and not as an input_file_name) if it wasn’t already specified within options (by using the ‘-e pattern’ or ‘-f file’ options). There can be zero or more input_file_names.
|2.1 Command-line Options||Short and long names, grouped by category.|
|2.2 Environment Variables||POSIX, GNU generic, and GNU grep specific.|
|2.3 Exit Status|| Exit status returned by |
|2.4 || |
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