Questions tagged [grep]
grep is a command-line utility that is used for searching text.
657
questions
-1
votes
2answers
75 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/...
0
votes
3answers
69 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 ...
1
vote
1answer
57 views
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. ...
0
votes
0answers
28 views
Remove directory from a saving .gen file using grep command [duplicate]
I have used the grep command to match a pattern then the matching row has saved in a file. But when saved the result it's saved with the file directory. But I want to save only the row result not the ...
0
votes
1answer
38 views
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 ...
0
votes
1answer
50 views
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 ...
0
votes
1answer
42 views
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-...
0
votes
0answers
17 views
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]...
...
0
votes
0answers
19 views
I want to search with RETCODE & find 5 lines above beginning with NE : . Is there any way to do it with grep?
**NE : TALS1_TO**
Report : +++ TALS1_TO 2021-01-25 02:02:18
O&M #806356831
%%/*1884960535 MML Session=1611550934*/MOD CELL:LOCALCELLID=2,CELLNAME="QALS12",ULEARFCNCFGIND=...
2
votes
1answer
117 views
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
...
2
votes
1answer
79 views
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)",
"...
0
votes
1answer
26 views
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 ...
0
votes
1answer
73 views
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$' myFile
But it gives out whole lines, not only the strings which end with '.txt'
2
votes
1answer
47 views
How to make grep grab the first hit instead of the last
Let's say I have the following string:
hello hi this test is test a test greeting test hello hello
If I do grep -o "hi.*test", I will get:
hi this test is test a test greeting test
It ...
-3
votes
2answers
92 views
Delete files with same file name
I have a lot of *.srt file in my folder. The thing is I have some same file multiple times with a slightly different name.Like This:
one_piece_001_US.srt
one_piece_SPECIAL_001_US.srt
one_piece_002_US....
0
votes
1answer
94 views
find files grep result then sort by file datetime modification
I have the following files
**file_01.sh**
abc
bla bla function pause(){
bla
foo function juliet(){
foo
**file_02.sh**
abc
bla bla function pause(){
bla
bla bla jjdjdjd
foo function charlie(...
0
votes
1answer
118 views
Grep -v doesn't work when piping with locate
I have the following command:
locate -br '^test.sh$'
The output is:
/home/cas/scripts/test.sh
I want to have the path without the name of the file. So I did the following to remove test.sh from the ...
2
votes
2answers
503 views
find -exec grep in series with an inverted grep, find nested grep
I have the following three files
**file_01.sh**
GOOD_word
bla bla BAD_word
miao GOOD_word bau
BAD_word
GOOD_word foo
**file_02.sh**
GOOD_word yes
GOOD_word bla bla BAD_word
GOOD_word ...
0
votes
1answer
20 views
Sed insists on doing partial matches
Ok, consider this example file:
#!/usr/bin/env bash
cat > example_file.txt <<EOL
group, , price
1, S_BRN_, 3.21
1, S_WBS_BRN_, 4.11
1, S_WBS_BRN, 1.22
2, S_BRN_WBS, 9.2
2, F_WBS_BRN_, 2.11
2, ...
1
vote
0answers
32 views
How can you use grep (or some similar program) to read all files as text files? [closed]
I am trying to find a string in a few files, however the files are currently read by Ubuntu as image files. How can I change this (in grep or in Ubuntu itself)?
0
votes
3answers
64 views
How to find files that user and group have the same permission [closed]
I would like to find the files that the user and the others have the same permissions. I tried ls -l and egrep but I don't know how I'll say that position 234 will be the same with position 567.
...
1
vote
0answers
28 views
grep without FILE parameter [duplicate]
What happens when FILE parameter is not given in grep
ls
folder1 folder2 new.txt new.cpp folder3 # -> folder 3 has all .cpp files with main
grep -rl -e "int main"
new.cpp
folder3/one.cpp
...
2
votes
0answers
53 views
How to make iostat ignore snaps
I am trying to filter out snap loop devices from iostat, while preserving the color formatting of the output.
I have tried the following:
iostat -y 5
iostat -y 5|grep -v loop
Neither option produce ...
0
votes
0answers
115 views
command history
Which is the most correct answer for this question: Write a one-line command that searches the last 50 commands that have been used for the term "find", and saves the result in history.txt
...
0
votes
0answers
38 views
matching single and double quotes in grep using -E [duplicate]
For practicing how grep works in Ubuntu terminal, I made one .txt file:
'"..asdf_-_-..34'""'"'"
jd8m***ns'''_**''x;';nn*?/...;
++..++
./,/;]_+))(+_)((*+_":|.<"{}...
0
votes
1answer
58 views
How to replace every 2nd line sed
How to replace every 2nd line of a text file with another text file list of lines.
Example:
cat filea.txt
I love Pink
I love Blue
I love Dogs
I love MOMO
cat bileb.txt
I hate yello
I hate white
I ...
0
votes
1answer
81 views
How to replace a varying number of strings on lines that match patterns
File1
<filename1.txt> stringA string1
<filename2.txt> stringA string2
<filename2.txt> stringB string3
File2
<filename1.txt> words and symbols < $ stringA words and ...
0
votes
0answers
27 views
grep regular expression to remove packages [duplicate]
This is an unexpected result I get
$ dpkg -l | grep linux-modules-nvidia-440-5.4.0-*
rc linux-modules-nvidia-440-5.4.0-26-generic 5.4.0-26.30+2 amd64 ...
asked Oct 20 '20 at 7:30
sancho.s ReinstateMonicaCellio
7,0393 gold badges18 silver badges45 bronze badges
11
votes
7answers
2k views
Show all lines before a match
I want to show all lines before a match, not only 10, or 7, or 14 for example, as explained in How do I fetch lines before/after the grep result in bash?.
How can I do it? It doesn't matter if the ...
0
votes
1answer
71 views
What does grep -cE “>” myfile.txt do?
I understand how to use grep; however, I am having trouble understanding the function of using ">" in my command?
0
votes
1answer
36 views
How to find out particular word “UNMAPPED” from several “UNMAPPED”
Hi I have a file which contains lines with word 'UNGROUPED' several times. But I want to extract the first line with 'UNGROUPED' and line with the word 'UNMAPPED' (present in file only once). Can I do ...
8
votes
2answers
409 views
How to use grep to search for options in a man page? [duplicate]
I want to search for specific options like -s, -f, -l in a manpage and display only the results that contain info on what those options do. I tried this command hoping that the single quotes would ...
1
vote
1answer
624 views
Does grep distinguish a variable and the $ regex?
I want to grep for a variable that has the string test, but I also want to make sure that it will only find test if that is the only word on a line.
So, I tried this:
string=test
echo "test" ...
1
vote
2answers
113 views
How to copy files with certain permissions to directory
I'm trying to make a copy of files with read and write permissions for the owner only, and then redirect that file to a directory named $dirA. I tried to use this command:
cp (ls -l ~| grep -type f-...
0
votes
1answer
41 views
Grep separates results by spaces
When using the following script
#!/bin/bash
cd ~/Downloads
pdffiles=$(ls | grep .*\.pdf )
for pdf in $pdffiles
do
echo $pdf
done
The printed result is the name of the files separated by one on ...
2
votes
1answer
75 views
How do you list the folder permissions of only certain directories that follow a common pattern in a particular directory?
For example, in the /etc/ directory there are several files named rc0.d, rc1.d, rc2.d, rc3.d etc
lets say you want to list the permissions or the sizes of these directories while ignoring other ...
1
vote
2answers
77 views
How do I get `abc.xyz.com` from `“127.0.0.1,abc.xyz.com”`?
I have a list in which data is in this format
"127.0.0.1,abc.xyz.com"
I want to get only abc.xyz.com without the IP address and double qoutes. How it can be done?
1
vote
1answer
187 views
Sort order of output when using sed and iterating in folder
I am using the following sed command to find a string in between patters for each file in a folder, files are named 01.txt, 02.txt etc.:
sed -n '/PAT1/,/PAT2/{/PAT1/!{/PAT2/!p}}' * >> file
but ...
0
votes
1answer
33 views
Command output is not redirected to file
I want to execute the following command, which is related to Rational ClearCase. The output of this command should be redirected to the file
testout.
Command
rgy_check -vobs > testout
Output
...
0
votes
1answer
260 views
ugrep PPA, snap or flatpack?
[Update: Please follow the instuctions in the accepted answer. A PPA, snap or flatpack is not necessary if you install from the source code.]
Is there a PPA that has ugrep executables available for ...
0
votes
0answers
642 views
How to find, change attr -i and delete files
I need a command to find, chattr -i and rm -rf (delete) files
I have a long list of files which I'm trying to delete using sudo find / | grep nginx | sudo xargs rm -rf and getting the following error:...
0
votes
2answers
1k views
Using grep to show k10temp-pci-00c3 CPU temp
I am using this to show my cpu temperature.
echo CPU Temperature >> /home/andy/bin/HD_AND_CPU_TEMPS.txt
sensors -f | grep "temp1" >> /home/andy/bin/HD_AND_CPU_TEMPS.txt
geany /...
2
votes
4answers
990 views
How to search for a word in a file but also show the whole file along with the found word?
I am using Ubuntu 16.04.
I want to search for a certain word, but I also want the whole file that contains the word to be outputted on the terminal so that I can see where in the file the word is ...
1
vote
1answer
64 views
Hyphen in egrep [duplicate]
I run the following command in bash:
echo "#fastq-dump SRR3105676 --gzip -O my &" | egrep "-O"
and I get
grep: invalid option -- 'O'
Usage: grep [OPTION]... PATTERNS [FILE]...
...
0
votes
0answers
31 views
Search in a file for a specific text in condition that other text does not exist
I have a text file bla.log that I want to search for a string "exception" and then print this exception in the screen only if 2 lines below this exception there is no string "freetouse&...
0
votes
2answers
263 views
Keep original spacing while doing replacements [AWK, SED, GREP, …]
I have two files which content are:
File 1:
ATOM 1 N LEU 1 -10.186 -21.276 -0.497 1.00 0.00 PROT
ATOM 2 HT1 LEU 1 -10.773 -22.005 -0.843 1.00 0.00 PROT
...
2
votes
1answer
100 views
What does grouping in extended regular expressions mean?
I read that grouping treats an expression as a single unit. What does that mean?
Furthermore, what does grep "\(grouping\)" file.txt or grep -E "(grouping)" file.txt do? I also ...
2
votes
2answers
162 views
Rename multiple files with variable extensions to remove beginning and end of filename
I have multiple files I need to rename as below:
5891_1_0_AD3884_ACTCTCGA_S10.bam
5891_1_0_AD3884_ACTCTCGA_S10.bam.bai
5891_1_AD3875_GAGCTTGT_S1.bam
5891_1_AD3875_GAGCTTGT_S1.bam.bai
...
2
votes
1answer
563 views
Asterisk is not working in Ubuntu 20.04 [duplicate]
After switching from 18.04 to 20.04, I noticed that the asterisk thing doesn't work.
For example: If I want to remove all nvidia packages, I type in sudo apt remove *nvidia* and apt removes any ...
0
votes
2answers
111 views
Can i use grep to search words on the content that i already have in terminal [duplicate]
I am new here and in the Linux world. So i am wondering if it is possible to search for a word in the content that i already have in my terminal.
Thanks in advance
