mirror of https://github.com/CrimsonTome/tldr.git
37 lines
1.3 KiB
Markdown
37 lines
1.3 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 --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 --recursive --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 --extended-regexp --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 --with-filename --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 --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 --invert-match "{{search_pattern}}"`
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