Mastering grep with Regular Expressions for Efficient Text Search

I mostly need it for searching snippets of code. Thanks for the writeup!

Great article…

Great article, thanks!

| The following expression matches the string “free” plus one or more characters that are not whitespace:

grep -E "free[^[:space:]]+" GPL-3

This wouldn’t match tab whitespace. For it to match tab whitespaces, you’ll need to make :space: into :blank: like so:

grep -E "free[^[:blank:]]+" GPL-3

Hi , i need a quick answer to this question, I have the following two string where i search for 20141107(Date) soon after 5 0r 6 characters after start, and if it comes latter, it should be ignored. in simple words, i believe there is no match for 20141107 in below two string. please help me write a regular expression for this.

FSDE5201410201411074218GCDR FSDE54201410201411074218GCDR

Crystal clear! I’m very grateful to this article.

How can i make RE for following ,

function any_fun_name**(any_arq,more_arq,…){** /// Code }

i want to match pattern for font in bold,

valid is,

function abc(){ }

function abvvdd(dfd,dfd,dfd){ }

Not valid is

function adfhdf() { }

thanks

i mostly need it for searching special characters . i need search for “sometext *” sometext space star

can you give me the command ? thanks

Nice Article , can we add this too ?

Usage 8: Search for multiple patterns for single word.

fgrep –f file_with_patterns.txt file_to_search.txt

Normally we search for only one pattern.But with fgrep we can give multiple patterns for searching string.

Usage 9: Search for String in Zip Files.

zgrep –i warning /var/log/Logs.gz

In linux,we zip the files with extension as “.gz”.We can search in Zip file by using above command.

Best slack i did for grep till now, cool run!

Thank you for providing explanations, demonstrations and hands-on material to experiment with…