search lines in files and standard output | grep command in linux | family of grep commands

Hello guys , this video is about grep command in linux which is used to search and select lines having defined pattern or string from files and standard output . I had explained grep command in detail with examples . I also described the way of using grep command using pipe character in linux. Examples of grep command with pipe is also provided. At last , I defined and explained family of grep commands which includes grep command , fgrep command , egrep command and many more .
Topics covered in this video are :
- grep command in linux
- examples on grep command in linux
- grep command to select line from file in linux
- grep command to select line from standard output in linux
- grep command with pipe in linux
- family of grep commands in linux
- egrep command in linux
- fgrep command in linux
- difference between grep , egrep and fgrep command in linux
- grep command for case insensitive search in linux
- grep command with file option in linux
- grep command to pring not matched lines in linux
- grep command with standard output in linux
- regex using grep command
- searching multiple strings using grep command in linux
- grep command in detail
- grep command with files in linux
- grep command with standard output in linux
#grep #command #family #linux
_____________________________________________________
Support My Work On ...
Patreon :) / pedagogy
_____________________________________________________
Connect With Me On ...
Telegram :) t.me/vpedagogy
Instagram :) / vikramsingh100998
LinkdIn :) / vikram-singh-0b3712178
Facebook :) / vikramsingh100998

[@amitlondhe3651]

Very good and clear explanation video. Thank you

[@MrVisheshsingh]

Thank you for sharing!

[@PedagogyV]

welcome :)

[@jalandharbehera8109]

Thank you so much sir.....I am so happy 🙏🙏🙏

[@PedagogyV]

welcome..and stay happy :)

[@sajinprasad8711]

Thanks bro

[@narayanaswamy9596]

Hii, your lectures are very simple and too good. In "20.0.RELEAESE" I want to grep only 20 from out of commented text. could you help me with this..

[@adammohammed4959]

how do I grep a file for lines containing the shell and display the output

[@RajRoy-wb1iz]

Hi... How can we grep certain numbers of line (say 10 lines) from a file and then print it in another file

[@PedagogyV]

for any set of lines you can use first sed command.
ex :- sed -n '2,12p' filename : it will print line 2 to line 12 of file . after that use grep within this range , i.e
sed -n '2,12p' file | grep word :- it will grep within this range of line and print them .
now , if you want to send the output to a file instead of printing , use redirect i.e
sed -n '2,12p' file | grep word > file2 :- it will redirect output to the file instead of printing.
hope , this will help :)
Not sure , why youtube is marking line over some of my comment , but take it as no line is marked on any comment.

[@boggarapulokesh3224]

Hey. I want to know whether i can compare two files line by line and print matching lines to a new file. I have tried using foreach loop. But didn't work. If possible let me know how i can do this using foreach loop. Thanks

[@PedagogyV]

stackoverflow.com/questions/373810/unix-command-to-find-lines-common-in-two-files
here , is your answer

[@boggarapulokesh3224]

@@PedagogyV No. That doesn't work. Comm - 12 works for small strings. Not for entire lines.
The content in 2 files that I'm comparing is like this. /shsvbs/clkc-r4738-sbs/sguahvs-refy_jegbsk/. Only bigger.
Each and every line in file1 is unique and has around 1000 lines. Same for the file2 as well. But some lines in both files match.
So comm - 12 doesn't do at all.
Have to use foreach or some other loop to compare 2 files line by line and output the matching lines to a 3rd file.

[@PedagogyV]

@@boggarapulokesh3224 Not sure why it is not working in your case. If possible , could you pls send these two file in telegram group, so that I can look into the problem and provide you some solution.

[@boggarapulokesh3224]

@@PedagogyV These are work files. So i can't send original files. But i can create and send sample files. What's your telegram in app name?

[@PedagogyV]

@@boggarapulokesh3224 yes, that will be great . The link for telegram will be in description of video.

[@Yogeshkumar-dc2cr]

how can i use grep -v in a file in foreach collection cmd

[@PedagogyV]

sry , didn't get "foreach colleaction cmd"..could you elaborate ?

[@Yogeshkumar-dc2cr]

@@PedagogyV I have 1 file in which I have to perform grep -v "pattern" 3 4 times
So I want to do via script. It's like if I source in outcomes without performing grep 3 4 times.

[@PedagogyV]

@@Yogeshkumar-dc2cr you can use shell scripts and loop 3.. 4 time ..
create an array first with index values like
arr=("pattern1" "pattern2" "pattern3")
for a in ${arr[@]}
do
grep -v ${a} dafile
done
in case it didn't work , please explain in telegram group

[@beastavinash4655]

Bro do you have notes of this?

[@PedagogyV]

sadly...no

[@beastavinash4655]

@@PedagogyV oke bro

[@shokhrukholimjonov5231]

Thank you it was very beneficial but stop using ok to much

[@PedagogyV]

its stopped in future videos

[@kunalmahajan9665]

If two words are in same sentence its would be display only those sentence and I want to know if we can search two words at a time in file that should display the only sentence
For eg:-
What is your name?
My name is Ram
Ram is my name
Ram what are you doing
Question :- search ram and name and display only those sentence. Not all containing single words.
Output :-
My name is Ram
Ram is my name

[@PedagogyV]

Hi, we can use multipl grep..
cat filename | grep Ram | grep name

[@BoffkaBoffka]

🙂Thankyou!!!👍