Questions tagged [grep]

grep is a command-line utility that is used for searching text.

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I need help trying to make a functional Zenity list

Here is what I have so far #!/bin/bash zenity --list --title "Packages" --list --text "select packages you want to install" --checklist --column "id" --column "...
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Searching text from a list in another file

Is there a grep-like program for Ubuntu that can search a text file, or batch of text files in a folder, for any occurances of words in another text file or a list like a csv file or an ods file or ...
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bash script for grep with context

Am writing a bash script that uses grep to search phrases and prints them on terminal. I want the user to have the possibility of using the context options of grep (-C, -A, -B). I made an indexed ...
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Using grep to find tag and get arbitrary string after it

So I have this pattern, the whole thing is one line <img itemprop="image" class="hovered__image jsOpenGallery lazyload" data-src="//static.yellowpages.ca/ypca/ypui-6.65.0....
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How to find searchable PDFs

I have a folder with many PDFs. Some are no doubt searchable. Can I search for and identify only those which are searchable? Adobe gives an error message if a PDF is an image, asking if you want to ...
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How do I grep for arabic characters with diacritical marks?

I have large TXT files in arabic Tashkil and I'm trying to find lines that contain specific pattern mashkula with َ ً ُ ٌ ّ ْ ٍ , I've tried the following grep syntax: cat file.txt | grep "...
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bash: do not show the part of the line that is in the search terms of the grep command

For example I have a directory: /A/B/C/D/E/F/G.txt Not knowing a priori /E/F/G.txt, I need to isolate that part. For ease of example: echo '/A/B/C/D/E/F/G.txt' | grep -o '/A/B/C/D' Shows: /A/B/C/D ...
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How to grep part of a path

in bash file I have: Path="/home/name/logs/*.log" I need to print just "/home/name/logs" How can I use grep (or other commands) to do this? Thanks
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VLC how to play all files that contain specific word

I would like to play all files in all subdirectories that contain specific term. I tried it using: find . -type f | grep Song | vlc I think I might be misunderstanding how | works, because it doesn't ...
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Grep Apache version from shell

with apache2 -v I get the following result: Server version: Apache/2.4.48 (Ubuntu) Server built: 2022-01-05T14:29:15 How can I get just "2.4.48" using grep? Thanks
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How to automatically open a file that has a dynamic filename

I'm trying to make an automation process, my workflow generates a file automatically, this file is named based on a timestamp and a public key. Example of the file name : UTC--2022-03-07T10-53-08....
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Console File Viewer which shows byte position numbers

I have a large data-file with record length 800 bytes. It is to big to open it in gui-texteditors, but less and grep is working fine. But I need to see fast which number is in the records on position ...
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how do I filter using grep with logins ending with a specified number

grep how can I find all the user logins that end with 88 and 89 ? I can get logins ending with a number if I do grep "[0-9]" filename
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Compare two lists, file1 and file2, get the IDs in file2 present in the usernames in file1

Please I need help... I have two lists, file1 and file2. The list file1 has only usernames, while file2 has the same usernames but with additional columns (username|private yes or no|id). Basically I ...
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How do I show all ipv4 and ipv6 addresses by using grep

I'm trying to grep inet addr and inet 6 addr from ifconfig. I can grep inet addr or inet6 addr alone only. How can I show both IPV4 and IPV6 addresses in one command?
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Can I make my own custom grep search tool?

I was trying to find a particular device on my machine. So I typed in lspci. This gave me a large list of items. Too large to constantly look through to see if my device is still attached or not. So I ...
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grep base on specific date

I have a file somewhere on my linux hard drive which I know was created in November, 2007. I have tried find and grep . Nov ?? 2007 in MANY combinations with no success. What am I missing?
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how to use grep -f and -v together

I have 2 files and I extracted information from file 2 based on file 1 by using grep -f file1 file2. Now if I want to use the output file to check if the columns based on file 1 are not there how can ...
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find all files and folders which have specific owner/group with grep

In home/oracle I have many files and folders. I need 2 different codes to: find (show) all files and folders belongs to user "Jim" from group "app" Change user owner of all files ...
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Find specific numbers of capitalized words next to each other

Let's say I have a .txt file: Aaa Aaa Bbb Aaa Bbb Ccc I want to find the row that has one capitalized word, two capitalized words, and three capitalized words. So one grep to find Aaa, one grep to ...
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Permission Denied Grep

I am completing a school assignment and it's pretty much based off of a murder case. I downloaded the custom files and I am currently searching for keywords within files. The question I am answering ...
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3 answers
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How to check for a specific string with linebreaks in a file with grep?

I have a string variable in a bash script file as follows: string=" test1 test2 " and I want to check whether a file test.txt containts this specific string (including the linebreaks. i....
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How can I Pipe the output of FFMPEG 2 Levels of Piping in a bash script

I have been trying to pipe 2 levels deep. I can pipe successfully: ffmpeg | grep ffmpeg | sed I can not pipe ffmpeg | grep | sed ffmpeg | sed | grep I don't understand, does ffmpeg limit to only ...
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grep command using wildcards [0-9]

grep ".0000000" data > output I extract the all numeric data ending with .0000000 in the data text file. When I changed this code using wildcard as follows: grep ".[0-9][0-9][0-9][0-...
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Where does /usr/bin/grep come from in Ubuntu Focal [duplicate]

When I run which grep on Ubuntu Focal, I get /usr/bin/grep. However, apt-file search /usr/bin/grep does not show a package which delivers it. Moreover, dpkg-query -L grep only shows /bin/grep (among ...
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2 answers
495 views

how to grep with multiple strings to find

I understand how to use grep in the simple form: <command that spits out text> | grep "text to find" I would like to be able to grep multiple different bits of text all at once. How ...
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terminal, tail, check 2 logs separated, with grep (or some option)

need check 2 logs in one window. I know there is multitail, but how can I use this with some pipe (grep or some filtering for example)? Example. multitail A.log (B.log | grep 193.85.23.66) Thank you.
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Grep - How to suppress the "Is a directory" line?

When running grep 'string' * I'm getting the following messages: grep: some-directory: Is a directory grep: other-directory: Is a directory How to suppress those messages?
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4 answers
162 views

How to cut part of line?

I need to cut line in specific moment, I want to display GPU name, but only name, nothing else. inxi -Gx | grep Device showing: Device-2: NVIDIA GK107GLM [Quadro K1100M] vendor: Dell driver: nouveau ...
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Can't escape a dot using backslash, Why? [duplicate]

So, following are the commands are I ran: $ ~/Documents: touch ball.txt bool-txt bowl.txt bull.txt $ ~/Documents: ls . | grep b..l\.txt ball.txt bool-txt bowl.txt bull.txt I wasn't expecting bool-txt ...
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When piping grep after a curl request, regex works very strange

Simple problem but really weird. When I make a curl request and do ... | grep -Po "^\d+$", it returns nothing eventhough there are 400+ results that should match. See below: #example snippet ...
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bash, display only in case output has count of n characters

how can I display content of output which has only count of n characters in second col divided by ,? For example, grep only line which content 4 characters in second col. Input. a,123 b,223 c,1234 d,...
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Grep pattern Matching Doesn't work?

I have a text file like so: "Id","District Name","Neighborhood Name","Street","Weekday","Month","Day","Hour","Part ...
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1 answer
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Pattern Matching using Grep

I'm trying to find a specific value for my file heres a quick snippnet of it: PRODUCT_TYPE_NAME,PRODUCT_CLASS_NAME,PRODUCT_SUB_CLASS_NAME,PRODUCT_MINOR_CLASS_NAME,PRODUCT_COUNTRY_ORIGIN_NAME,...
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Capture a string from JSON response

I have below Json response for POST method in bash and would like to capture value after sessionId":" and assign it to variable session_ID. {"changeId":"79911476-53a4-46e1-...
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Finding a specific text phrase in all system files

Trying to find a specific text phrase in all system files. A terrible way to debug but I have no clue where the mistake is and at this point I do not care whether it takes a day to debug. I ran grep -...
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2 answers
215 views

How do I grep a exact string from multiple files at the same time? [closed]

I have multiple files(text file) in a folder like below where the 1st file contains some paths as a string and the other with path+file_name. File1: # pwd /root/test # cat file1.txt /abc/bce/12345/...
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1 vote
3 answers
86 views

How to delete part of a line and keep the rest using Bash?

Suppose that I have an output of lines like this: First name, Last name, 123456789(9 digits) GPA Class Major University How can I write some code to print the first 3 lines and only keep the ID ...
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1 answer
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how to use grep and sed on adb logcat

I'm currently using grep in combination with adb logcat (android console api). Now I want to edit every line on the fly using sed in a pipe. However when using sed after grep the output becomes empty. ...
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how to select the specific string from 'ls' command console output?

I am newbie on linux os. My target is selecting files which have the specific string values in filenames on console mode This is my sample filename, filename : apnic-2016-02-01 condition : The first ...
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Cannot parse dst/src address

I created second ubuntu and then I installed openvpn then I wrote that command: sudo ss -tupln ׀ grep openvpn But was written Error: an inet prefix is expected rather than "׀". Cannot ...
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grep: option requires an argument -- 'm' [duplicate]

I'm trying to grep a file in order to find a line containing this text: "-m". I've created this file to test this issue: echo "min-value: 2" >> test.txt echo "original-...
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Pass string with special character to grep as pattern [duplicate]

Trying to filter command output according pattern -p docker run --help |grep -F '-p' But grep treats it as -p as command option: grep: invalid option -- 'p' Usage: grep [OPTION]... PATTERNS [FILE]... ...
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Need to move files found using grep into a folder

As part of a University course, I'm trying to reclusively search for a string in a list of 500 files, and then copy those items found into a new folder. I can find the files without a problem using ...
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2 votes
1 answer
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grep a string in a json output

I have an api-request that gives the output in the json form (form? layout? body? how do you say that?). See here: { "title": "Another Life (2019)", "...
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usage of grep command using the file includes the numeric sequences

I have a data file (seq_array) that includes the numeric sequences as follows: seq 640094400 60 640180770 I have also another file (data_file) that includes the data need to be extracted with respect ...
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How to grep all the strings which end with '.txt'

I need to find all the strings which end with '.txt' inside text file. I tried: grep 'txt$' myFile But it gives out whole lines, not only the strings which end with '.txt'
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2 votes
1 answer
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How to make grep grab the first hit instead of the last

Let's say I have the following string: hello hi this test is test a test greeting test hello hello If I do grep -o "hi.*test", I will get: hi this test is test a test greeting test It ...
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2 answers
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Delete files with same file name

I have a lot of *.srt file in my folder. The thing is I have some same file multiple times with a slightly different name.Like This: one_piece_001_US.srt one_piece_SPECIAL_001_US.srt one_piece_002_US....
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find files grep result then sort by file datetime modification

I have the following files **file_01.sh** abc bla bla function pause(){ bla foo function juliet(){ foo **file_02.sh** abc bla bla function pause(){ bla bla bla jjdjdjd foo function charlie(...
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