tldr/pages/common/grep.md

grep

Matches patterns in input text. Supports simple patterns and regular expressions.

• Search for an exact string:

grep {{something}} {{file_path}}

• Search recursively in current directory for an exact string:

grep -r {{something}} .

• Use a regex:

grep -e {{^regex$}} {{file_path}}

• See 3 lines of context:

grep -C 3 {{something}} {{file_path}}

• Print the count of matches instead of the matching text:

grep -c {{something}} {{file_path}}

• Print line number for each match:

grep -n {{something}} {{file_path}}

• Use the standard input instead of a file:

cat {{file_path}} | grep {{something}}

• Invert match for excluding specific strings:

grep -v {{something}}