mirror of https://github.com/CrimsonTome/tldr.git
37 lines
1.4 KiB
Markdown
37 lines
1.4 KiB
Markdown
# grep
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> Find patterns in files using regular expressions.
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> More information: <https://www.gnu.org/software/grep/manual/grep.html>.
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- Search for a pattern within a file:
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`grep "{{search_pattern}}" {{path/to/file}}`
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- Search for an exact string (disables regular expressions):
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`grep {{-F|--fixed-strings}} "{{exact_string}}" {{path/to/file}}`
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- Search for a pattern in all files recursively in a directory, showing line numbers of matches, ignoring binary files:
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`grep {{-r|--recursive}} {{-n|--line-number}} --binary-files {{without-match}} "{{search_pattern}}" {{path/to/directory}}`
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- Use extended regular expressions (supports `?`, `+`, `{}`, `()` and `|`), in case-insensitive mode:
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`grep {{-E|--extended-regexp}} {{-i|--ignore-case}} "{{search_pattern}}" {{path/to/file}}`
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- Print 3 lines of context around, before, or after each match:
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`grep --{{context|before-context|after-context}} 3 "{{search_pattern}}" {{path/to/file}}`
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- Print file name and line number for each match with color output:
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`grep {{-H|--with-filename}} {{-n|--line-number}} --color=always "{{search_pattern}}" {{path/to/file}}`
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- Search for lines matching a pattern, printing only the matched text:
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`grep {{-o|--only-matching}} "{{search_pattern}}" {{path/to/file}}`
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- Search `stdin` for lines that do not match a pattern:
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`cat {{path/to/file}} | grep {{-v|--invert-match}} "{{search_pattern}}"`
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