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Questions tagged [grep]

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

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Unexpected grep Messages During SSH Command Execution

When attempting to execute SSH commands on remote servers using grep within a Bash script, I encounter unexpected grep messages instead of the expected command output. error message : The issue ...
KaaaaaaaaaK's user avatar
0 votes
2 answers
138 views

Full username in process snapshot format

I'm trying to get processes snapshot of PM2 usage bitrix 1948 4.0 0.9 1586136 748292 ? Ssl Apr09 426:12 PM2 v5.2.2: God Daemon (/home/bitrix/.pm2) by ps waxfu | grep "[P]M" but ...
palmasd1's user avatar
-1 votes
1 answer
70 views

How do I find files of a certain extension(s) except in paths that contain certain strings and then print the result to a file?

Upon a little search, I came up with this command: > find . -type f \( -name "*.exe" \) | egrep -v > 'games_1|rei|games|tor|jogos|mods|text' > 1 What I wanted to do was find files ...
Nuno Fonseca's user avatar
0 votes
1 answer
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changing grep command --color from red to another color [duplicate]

I'm searching from the file using grep command with particular pattern, sysadmin@localhost:~$ grep bash /etc/passwd which return the output like below root:x:0:0:root:/root:/bin/bash ...
SpiderMan's user avatar
0 votes
1 answer
88 views

caret character unexpected behaviour in regular expressions with grep

i was running grep commands from "William Shotts" regular expressions example.It seems,the caret character is not doing what it is supposed to do. I have four test files with all the bin ...
S.Das's user avatar
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1 vote
1 answer
52 views

Why doesn't the given command mask other lines? [duplicate]

Command: sudo find / -name miniedit.py -print | grep -i "miniedit" | tail -1 Output: find: ‘/proc/10031/task/10031/net’: Invalid argument find: ‘/proc/10031/net’: Invalid argument find: ‘/...
kesarling's user avatar
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4 votes
3 answers
641 views

Search for a "string" or "String with Spaces" recursively that may be a file- or directory-name or a text inside a file

I would like to search for the string rstudio (and its different possible combinations mentioned below) recursively starting from /. In some locations, rstudio is a string inside another file (but ...
koustav_ch's user avatar
2 votes
3 answers
659 views

What grep pattern allows to print only one-word lines?

I want to print the lines with only one no-spaces subsequences of characters while use grep on the text. title after grepping should to print title the sentence after grepping should not print ...
palmasd1's user avatar
4 votes
2 answers
1k views

Using grep to search for line that begins with a variable whose value is a dollar sign

I found a lot of very similar problems, but not exactly this. I have a text file with the following contents (no repeats, fixed 4 characters per line): A1234 G1234 $1234 M1234 I'm trying to use grep ...
Aylox's user avatar
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0 votes
3 answers
229 views

Filter RE in grep

The command that I have is: grep -E '^ [0..9]' The pattern that I have 24 -38.54270131 24 -38.54085331 24 -38.53603119 24 -38.53427780 24 -38.53396521 24 -38....
Another.Chemist's user avatar
0 votes
4 answers
296 views

How can I search a file to see if it contains multiple patterns anywhere in the file?

I would like to be able to search a list of files for a list of patterns. The file must contain all of the patterns and the patterns can be anywhere within the file. Is there some way grep can do this ...
Barry Kimelman's user avatar
1 vote
1 answer
453 views

Search a particular string with grep

I want to search in a file with a particular string and show only those lines that exactly match with the string but that doesn't seem to work with grep -w. This is just an example as I would be ...
sunny_hkhk's user avatar
0 votes
1 answer
527 views

How to use invert match regex in sed? like grep

How can I use invert match regex like grep -v ? I want invernt sed '/[Ss][0-9]*[Ee][0-9]*/d' ${Src} like grep -ev '[Ss][0-9]*[Ee][0-9]*' ${Src}
fsgdfgdfgd's user avatar
0 votes
1 answer
375 views

How to use variable in Find and grep command?

find command to get files have part of their names as date ($Y variable that has date in the script) Y=(date -d "1 day ago" "+%Y-%m-%d") find /log/bssuser/CDR/Postpaid_CDR_Log/ -...
Amany Abd Elmnem's user avatar
0 votes
2 answers
64 views

Needing more efficient grep for excluding numerical value when in a string

I am grepping log files looking for results that show the output of 'queued 10' or higher. Ex. grep 'queued' *20231016* | grep -vE 'queued 1|queued 2|queued 3' This works fine, however, is there a ...
Wil's user avatar
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0 answers
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Want to create a mask or formatting display for a file...where do I start?

on my computer I have plenty of text files which I use to configure an audio device (actually a Line6 guitar multieffect HX Stomp), and these files look like the example hereunder. So there are lots ...
Vinz M's user avatar
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0 votes
1 answer
93 views

How to find a string in files, said string including line breaks, ", @

I know grep allows me to search for a string in files, however I did not manage to find the right method to search for the following string: "snapshot3" : { "@custom_name" : ...
Vinz M's user avatar
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0 votes
0 answers
166 views

How to get some lines before and after in log files using tail and grep? [duplicate]

How to get some lines before and after in log files using tail and grep ?
indrajit narvekar's user avatar
0 votes
1 answer
157 views

How can I determine the prematch and postmatch using egrep or ksh under linux

I am working on a issue at the office running on a linux system. I would like to be able to either use egrep or ksh pattern matching to determine not only the matched string but I also need to be able ...
Barry Kimelman's user avatar
0 votes
0 answers
13 views

How to grep for an exact match of a string? [duplicate]

I want to find exact matches in a file that matches the string "1.2.0" (the numbers 1 and 2 and 0 with a single dot inbetween them). I am trying this as follows: cat /my/file.log | grep &...
Alex's user avatar
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0 votes
1 answer
190 views

How to delete multiline string with grep

Let's say I have file.txt with following content (simplified for example. In real it's much more complex): This line I DON'T want to remove \ common substring This line I want to remove \ ...
JaSON's user avatar
  • 123
1 vote
1 answer
635 views

How can i fix Brightness adjustment on iMac 11.2 under Ubuntu 22.04.3 LTS ? The brightness still at his max

I'm new to Linux, and I don't know much about commands, I have an iMac 11.2 Intel® Core™ i5 CPU 680 @ 3.60GHz × 4, RAM 12 gb on which I installed Ubuntu 22.04.3 After solving the ventilation problem ...
Lambrah93's user avatar
0 votes
0 answers
15 views

Grep: How to search for an exact string of numbers in a file [duplicate]

So I have a file 2k6d.pqr with a list of coordinates and I am trying to find one particular one. I type in grep "-6.139 0.0488 1.4870" 2k6d.pqr and it returns an error: grep: invalid ...
Pundarikaksha Kavipurapu's user avatar
0 votes
2 answers
236 views

Detect multiple files at subfolder containing specific string on Linux

I have multiple files of work.log at different subfolders need to detect two keyword Can't find file or Not pass by number Direct path like : /folder/Date/Job1/20190116_ADMtest_1/ADM.log /folder/Date/...
Ollie's user avatar
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1 vote
2 answers
39 views

find special characters in filenames and copy them into new folder. filenames may contain weird non ascii characters and special ones

I like to copy all files with special character "|" in filenames (not the pipe one) into a folder. However, i have several problems cause filenames may include ascii and not ascii characters,...
Estatistics's user avatar
5 votes
3 answers
1k views

how can I get unique ip addresses from /var/log/auth.log?

How do I only show the unique IP addresses in /var/log/auth.log ? I have a server getting hit constantly, and while I have set up fail2ban, the requests keep coming. So I started writing to ISPs to ...
j0h's user avatar
  • 15k
0 votes
1 answer
52 views

Why egrep outputs two blank lines but "redirecting to file" produces actual text

I'm using Ubuntu 20.04.4 with stock grep version 3.4. I find something I cannot explain, please help. [/dev/pts/0(xterm-256color) 2023-04-04 10:28:01 ERR:0] [chj @Ub20cppdev ~/test] $ cat input3l.csv ...
Jimm Chen's user avatar
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3 votes
2 answers
1k views

Running grep via GNU parallel

How can I make searches with grep on a large number of files run faster? My first attempt uses parallel (which could be improved or other approaches suggested). The first grep simply gives the list ...
Fatipati's user avatar
2 votes
3 answers
1k views

Passing multiple file patterns to grep

I have a sequence of search patterns stored in a bash array (ptrn), which I want to pass to a grep command. How can I do it? ptrn=("FN" "DS") for fl in "$@"; do # ...
Fatipati's user avatar
1 vote
1 answer
120 views

grep PCRE still greedy

I'm searching a multi-line text file and want to match a string from a certain word until the first match of another word: start word1 word1 word1 word1 end word2 word2 word2 start word3 word3 word3 ...
Adenano's user avatar
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0 votes
1 answer
89 views

How do I pipe grep commands with a "-" without it being interpreted as an option? [duplicate]

I'm using a Kali Linux distribution and I'm trying to learn how to use the | character for piping using grep. If I wanted to search the hashcat help file for what -a means for example, how would I do ...
Eggwind's user avatar
0 votes
1 answer
95 views

How to extract channel names from YouTube subscription source file

I have an html source file of YouTube subscriptions, and want to extract just the /user/CHANNELNAME parts into a separate file. The source file (browser > youtube.com > subscriptions > manage ...
Broadsworde's user avatar
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-1 votes
1 answer
276 views

What's wrong with 'grep' command in Ubuntu-18.04.6?

I enjoyed 'grep' for decades but I left Linux years later and I came back again, finding 'grep' works different from before. I checked its usage from web and confirm my memory is not corrupted. I am ...
Stan Huang at Taiwan's user avatar
0 votes
1 answer
68 views

How to Categorically Relocate Records Using Grep

I need to parse a file containing records beginning with a keyword and selectively write those records to separate category files. After this is done, the records that were extracted need to be ...
Paul_Capo's user avatar
-3 votes
1 answer
637 views

Trying to pipe, redirect, or use `grep` or similar commands in a sftp environment

How can i limit the ls command output to display only the most recent X number of files created within a folder in a sftp environment ? tail, grep, or > >> (redirect commands) are not ...
GreuDeFumat's user avatar
1 vote
1 answer
473 views

grep and awk commands not returning or storing output to the variable

I have a (users.csv) file containing a list of id's of all employees. I need is to loop through this file for each employee, search if it exists in backup.txt file using grep and store the output in a ...
Haider Ali Syed's user avatar
-1 votes
1 answer
189 views

Trying to remove all text except for IPs, data is in a file I downloaded

This is what I normally use to normalize the data, but it is not working. I need to keep only the IPs, one IP per line, and everything else must go. I'm using this in an .sh shell script. grep -oE '[...
Jrecho's user avatar
  • 1
0 votes
2 answers
184 views

why grep with regex command not working on Ubuntu

I wanted to know the packages which are installed and starting with mos then below command not working. dpkg -l | grep ^mos*
GMudide's user avatar
  • 6,715
0 votes
1 answer
225 views

How to grep on a file owned by nobody?

I have a /etc/openvpn/test.txt file with the following status and a single word content "test": -rw-r--r-- 1 nobody root 173 Jan 25 21:48 test.txt When I try to grep on it I get a ...
PouJa's user avatar
  • 163
0 votes
1 answer
499 views

ps aux | grep command doesn't display categories

When I pipe to grep after a ps aux command it isn't showing the categories at the top of the list (USER, PID, %CPU, %MEM, etc) Is there something I can do about this? ps aux --sort -rss | grep $USER | ...
Onizuka's user avatar
1 vote
3 answers
249 views

unable to store output of awk command

I am trying to print git clone progress in a minimalistic way for my project. Aim Instead of printing a whole git clone output on screen remote: Enumerating objects: 1845678, done. remote: ...
Eswar Reddy's user avatar
0 votes
1 answer
81 views

Does grep and friends have a way to match strings as if shell file name globbing in stead of regex

Effectively I'm trying to search a text file containing "file names" and want to match as if shell file globbing were in effect. Shell file globbing is much simpler than regular expressions, ...
VagrantPaladin's user avatar
2 votes
1 answer
376 views

Grep only until certain symbol

I try to grep some string and want grep to stop at a '+' symbol. The searched string could be "foo" or "foo+bar". Grep treats all findings no matter what comes after foo and the -w ...
diggidre's user avatar
  • 111
2 votes
1 answer
810 views

Why "mount | grep sdb" displays no output, when "sdb" drive is a [swap] partition?

I'm learning about lsblk and mount commands in Ubuntu. I'm using Linode vps server, 2CPU, 4GB ram with 1 additional block storage volume attached. I have 2 questions related with this subject. At ...
michal roesler's user avatar
2 votes
1 answer
135 views

How to search output of help message of program (using e.g. grep)

I have a directory with executables and I want to search for a word in the output of the help messages of these executables, i.e. the text that is printed in the console after using the command ./...
Kvothe's user avatar
  • 653
9 votes
2 answers
873 views

Grep ignore array of patterns

Since I learned some bash syntax, I have being very enthusiastic about its use in daily life. A famous command is grep. In case one with to grep something but ignore several files, the commands below ...
Bruno Peixoto's user avatar
0 votes
1 answer
71 views

How to list disk usage by directory, excluding certain output

I am trying to get a sense of disk usage and I want to exclude the ones I cannot access like this - any suggestions? sudo du -h / --max-depth=1 | grep -v "cannot access" Thanks.
SEU's user avatar
  • 139
2 votes
1 answer
818 views

How to log URL to a file only if it’s HTTP status code is 200?

I want to make a script so I can check if I can connect to several URL. For example I do curl -i -L --silent URL | grep "HTTP/2 200" >> *.txt I want to combine it with an if statement ...
bahsnub's user avatar
  • 21
1 vote
1 answer
415 views

chkrootkit says "grep --color=auto INFECTED," what should I do?

I just installed and ran chkrootkit for the first time and when I ran sudo chkrootkit | grep INFECTED, it returned ![user] 21342 pts/0 grep --color=auto INFECTED I'm a complete novice at this and ...
galleon's user avatar
  • 11
0 votes
0 answers
314 views

How to replace URLs from html to a file using grep, sed or any common tools?

I'm trying to replace URLs of my conf file from a HTML file because sometimes the URLs get updated/changed. I need a simple script that can fetch the HTML & update/replace the URLs in my conf file....
OrigamiOfficial's user avatar

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