Linux Grep Command

Grep command stands for Global Regular Expression Printthis command looks inside the file and display a text by searching.this command are used many options like -i and more options used this command the following example and discription of this command.

Syntax

$grep [option] [text or pattern to be searched] [file_name]

Example

 
$grep "tutorialsstudio" file1.txt
							

it will display the whole statement,containing a text(pattern) "tutorialsstudio" inside file1.txt(Searching text will be highlighted).note that,it will follow the case according to your searching text,like here tutorialsstudio keyword will be found with starting "t".


Sr.No

Options

Descriptions

01

-i

for ignoring the case,while searching the text from file.

02

-c

for counting the number of line containing a pattern or text.

03

-w

match whole word only(ex. searching for exact word "is".if any word contains substring "is" will not be considered).

04

-r

recursive searching.(it is used,when you want to search in all the file inside a directory)

05

-n

shows line number while displaying the output.

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