Invoking (GNU Grep 3.7)
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2 Invoking grep
The general synopsis of the grep
command line is
grep [option...] [patterns] [file...]
There can be zero or more option
arguments, and zero or more file
arguments. The patterns
argument contains one or more patterns separated by newlines, and is omitted when patterns are given via the ‘-e patterns
’ or ‘-f file
’ options. Typically patterns
should be quoted when grep
is used in a shell command.