tldr/pages/common/grep.md

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# grep
> Matches patterns in input text
> Supports simple patterns and regular expressions
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- search for an exact string
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`grep {{something}} {{file_path}}`
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- search recursively in current directory for an exact string
`grep -r {{something}} .`
- use a regex
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`grep -e {{^regex$}} {{file_path}}`
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- see 3 lines of context
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`grep -C 3 {{something}} {{file_path}}`
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- print the count of matches instead of the matching text
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`grep -c {{something}} {{file_path}}`
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- print line number for each match
`grep -n {{something}} {{file_path}}`
- use the standard input instead of a file
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`cat {{file_path}} | grep {{something}}`
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- invert match for excluding specific strings
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`grep -v {{something}}`