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 in case-insensitive mode:

`grep -i {{something}} {{path/to/file}}`

- Search recursively in current directory for an exact string:

`grep -r {{something}} .`

- Use a regular expression (`-E` for extended regex, supporting `?`, `+`, `{}`, `()` and `|`):

`grep -e {{^regex$}} {{path/to/file}}`

- Print 3 lines of context around each match:

`grep -C 3 {{something}} {{path/to/file}}`

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

`grep -c {{something}} {{path/to/file}}`

- Print line number for each match:

`grep -n {{something}} {{path/to/file}}`

- Use the standard input instead of a file:

`cat {{path/to/file}} | grep {{something}}`

- Invert match for excluding specific strings:

`grep -v {{something}}`
initial commit 2013-12-08 08:56:16 +00:00			`# grep`

Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`> Matches patterns in input text.`
			`> Supports simple patterns and regular expressions.`
initial commit 2013-12-08 08:56:16 +00:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Search for an exact string:`
Fix lint for common 2015-10-22 08:31:52 +01:00
Markdown format closer to the output + highlight replacable tokens 2013-12-09 11:12:16 +00:00			`grep {{something}} {{file_path}}`
initial commit 2013-12-08 08:56:16 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`- Search in case-insensitive mode:`
grep: add -i option 2016-01-27 22:12:10 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`grep -i {{something}} {{path/to/file}}`
grep: add -i option 2016-01-27 22:12:10 +00:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Search recursively in current directory for an exact string:`
Add an explanation of recursive search. 2014-01-28 12:41:32 +00:00
			`grep -r {{something}} .`

make extended regex character list more readable 2016-04-22 14:23:06 +01:00			- Use a regular expression (`-E` for extended regex, supporting `?`, `+`, `{}`, `()` and `\|`):
initial commit 2013-12-08 08:56:16 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`grep -e {{^regex$}} {{path/to/file}}`
initial commit 2013-12-08 08:56:16 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`- Print 3 lines of context around each match:`
initial commit 2013-12-08 08:56:16 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`grep -C 3 {{something}} {{path/to/file}}`
initial commit 2013-12-08 08:56:16 +00:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Print the count of matches instead of the matching text:`
initial commit 2013-12-08 08:56:16 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`grep -c {{something}} {{path/to/file}}`
initial commit 2013-12-08 08:56:16 +00:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Print line number for each match:`
grep: add line number 2016-01-05 05:30:21 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`grep -n {{something}} {{path/to/file}}`
grep: add line number 2016-01-05 05:30:21 +00:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Use the standard input instead of a file:`
initial commit 2013-12-08 08:56:16 +00:00
various tweaks to grep - use "case-insensitive" in the description of the -i option to make the initialism clear - use path/to/file instead of file_path - mention extended regex syntax and expand first occurrence to spell "regular expression" - clarify wording of the -C example description 2016-04-22 12:24:24 +01:00			`cat {{path/to/file}} \| grep {{something}}`
Added invert match parameter. 2014-07-27 09:23:56 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Invert match for excluding specific strings:`
Added invert match parameter. 2014-07-27 09:23:56 +01:00
Fixed token syntax. 2014-07-27 13:10:52 +01:00			`grep -v {{something}}`