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Why does grep match all lines for the pattern "\'"

Tags:

regex

grep

In this SO question there is something that I cannot explain:

grep "\'" input_file

matches all lines in the given file. Does \' have a special meaning for grep?

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425

asked Jul 28 '12 08:07

perreal

1 Answers

grep regex GNU extension: ‘\'’ matches the end of the whole input

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190

answered Sep 21 '22 08:09

Richard Sitze

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