All Questions
Tagged with command-line grep
367
questions
-1
votes
1
answer
68
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 ...
- 422
0
votes
1
answer
69
views
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 ...
0
votes
1
answer
83
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 ...
- 3
1
vote
1
answer
50
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: ‘/...
- 121
4
votes
3
answers
637
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 ...
- 43
2
votes
3
answers
638
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 ...
- 51
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
$1234
M1234
I'm trying to use grep ...
- 43
0
votes
3
answers
229
views
Filter RE in grep
The command that I have is:
grep -E '^ [0..9]'
The pattern that I have
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-38.54085331
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-38.53603119
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-38.53427780
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-38.53396521
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-38....
- 352
0
votes
4
answers
253
views
How can I search a file to see if it contains multiple patterns anywhere in the file?
I would like to be able to search a list of files for a list of patterns.
The file must contain all of the patterns and the patterns can be anywhere within the file.
Is there some way grep can do this ...
- 103
1
vote
1
answer
437
views
Search a particular string with grep
I want to search in a file with a particular string and show only those lines that exactly match with the string but that doesn't seem to work with grep -w.
This is just an example as I would be ...
- 19
0
votes
1
answer
345
views
How to use variable in Find and grep command?
find command to get files have part of their names as date ($Y variable that has date in the script)
Y=(date -d "1 day ago" "+%Y-%m-%d")
find /log/bssuser/CDR/Postpaid_CDR_Log/ -...
0
votes
1
answer
74
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" : ...
- 169
0
votes
0
answers
149
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 ?
0
votes
1
answer
152
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 ...
- 103
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 &...
- 865
0
votes
1
answer
186
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 \
...
- 123
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 ...
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 ...
- 14.9k
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 ...
- 1
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 # ...
- 1
0
votes
1
answer
88
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 ...
- 3
-1
votes
1
answer
265
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 ...
0
votes
1
answer
67
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 ...
- 13
1
vote
1
answer
460
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 ...
0
votes
1
answer
479
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 | ...
- 3
1
vote
3
answers
248
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: ...
- 13
2
votes
1
answer
368
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 ...
- 111
2
votes
1
answer
131
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 ./...
- 657
2
votes
1
answer
783
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 ...
- 21
0
votes
2
answers
757
views
How to exclude words using grep?
Instead of me chaining these like 10 times
cat /var/log/nginx/access.log | grep -v download | grep -v danger | grep -v "/visitor/return" | grep -v welcome | grep -v "GET / HTTP" | ...
- 195
1
vote
1
answer
230
views
How to grep certain attribute from openldap?
I am using openldap and usually I will use command ldapsearch uid=<ldap> + to check certain attribute and by running such command, it will produce full output for example :
SASL/EXTERNAL ...
- 75
2
votes
1
answer
2k
views
Grep output from application, show to screen and write to file?
I run an application and pipe the output to grep. This works. However, I wish to show the output on both screen and write to file.
So I am piping the grep result to tee:
./app | grep something | tee ...
- 377
0
votes
1
answer
2k
views
grep fails to find text in docx file
I cannot find the reason why grep cannot find the file with the word 'coomunities'. I used
grep -ril --include=GLOB "coomunities" .
Note: communities is on purpose mispelled.
The file is a ...
- 185
0
votes
1
answer
394
views
grep command to get file list with concatenated custom text
I am trying to list of files' names with custom text(my another command) with it. I am using below command:
grep -rl --include=*.php --include=*.html --include=*.js 'ajax.googleapis.com/ajax/libs/...
- 241
0
votes
2
answers
137
views
Grep file for one target (+ next 3 lines) OR another target (just that line)
I want to search a file for two target strings. For the first target I wish to return that line and the 3 lines following it. For the second target string I want to return just the line containing the ...
- 677
0
votes
0
answers
957
views
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 ...
0
votes
0
answers
252
views
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 ...
- 1
2
votes
2
answers
1k
views
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....
- 23
6
votes
2
answers
1k
views
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 "...
- 363
0
votes
2
answers
531
views
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
...
- 287
1
vote
1
answer
222
views
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....
- 111
-4
votes
1
answer
217
views
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 ...
- 11
-4
votes
1
answer
779
views
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 ...
- 95
0
votes
0
answers
46
views
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 ...
6
votes
3
answers
3k
views
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....
- 109
0
votes
3
answers
8k
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 ...
- 103
4
votes
2
answers
6k
views
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?
- 2,175
0
votes
1
answer
2k
views
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 ...
- 582
1
vote
1
answer
149
views
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,...
- 121
1
vote
3
answers
611
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 ...
- 31