grep

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Regex patterns

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• Find line in file
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• Input methods
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• Output only matching
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• rg

Content

Usage

grep [OPTIONS] PATTERN [FILE...]
grep [OPTIONS] [-e PATTERN | -f FILE] [FILE...]

Quick view

Use Case	Command Example
Basic Search	grep "PATTERN" FILENAME
Case-Insensitive Search	grep -i "PATTERN" FILENAME
Count Matches	grep -c "PATTERN" FILENAME
Display Line Numbers	grep -n "PATTERN" FILENAME
Invert Match	grep -v "PATTERN" FILENAME
Recursive Search	grep -r "PATTERN" DIRECTORY
Show Context	grep -C NUM "PATTERN" FILENAME
Extended Regex	grep -E "REGEX_PATTERN" FILENAME
Piping	command \| grep "PATTERN"