Linked Questions
23 questions linked to/from Capturing Groups From a Grep RegEx
0
votes
3
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how to egrep after using egrep -o [duplicate]
I have a file called random.html with the following line(not the only line):
blahblahblahblah random="whatever h45" blahblahblahblah
I want to specifically only get whatever, so far i used the ...
- 59
-2
votes
1
answer
330
views
How to capture specific text with grep, in Bash Command Line? [duplicate]
I need to capture a specific string using grep, on Bash Command Line. I cannot use sudo install/apt-install to install any addition software/packages like jq. I am not using any Python Interpreter; ...
0
votes
0
answers
114
views
Parse netstat -s using regex in shell script [duplicate]
netstat -s gives output like below
Tcp:
12345 active connections openings
34345345 passive connection openings
3434 failed connection attempts
54545 connection resets received
5 connections ...
-2
votes
1
answer
111
views
How can bash recognize regex groups? [duplicate]
I am trying to use regex to match a filename out of a path.
#!/bin/bash
regex=[^/]+?(?=.zip)
path="/home/quid/Downloads/file.zip"
if [[ $path =~ $regex ]]
then
echo "Found a match"
echo $...
- 67
0
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0
answers
44
views
411
votes
12
answers
643k
views
How can I output only captured groups with sed?
Is there a way to tell sed to output only captured groups?
For example, given the input:
This is a sample 123 text and some 987 numbers
And pattern:
/([\d]+)/
Could I get only 123 and 987 output in ...
- 29.1k
68
votes
8
answers
63k
views
Grep - how to output only the content of a capturing group
I am trying to find a way for grep to output only the content of a capturing group. For instance, if I have the following file:
hello1, please match me
hello2, please do not match me
I would like
...
- 1,202
3
votes
5
answers
5k
views
Extracting string between two slashes using sed [duplicate]
I am trying to use sed to extract a specific string from a line within a file. Currently I am reading in a file with a while loop and searching for a specific string. When that string is found I am ...
- 97
3
votes
5
answers
1k
views
Pass the matched value to a function, and replace with the return value
How would I get Bash to match a regular expression, but rather than replace the value with a constant string, it will instead pass the matched value to a function, and then get the value to replace ...
- 8,360
1
vote
4
answers
1k
views
Bash script for getting tag value
Is there any way to get value(Yes or No) if i only have tag("answer_yes" or "answer_no") which are described in a xml file. I want to get them using bash.
<string tag="answer_yes" value="Yes"/>
...
- 126
2
votes
3
answers
1k
views
Bash - Extract region from AWS arn
Very simple task: extract the region from an AWS arn.
Example:
arn:aws:lambda:eu-west-2:12345678912:layer:my-awsome-layer:3
I need to extract eu-west-2
I have a working regex for this: ^(?:[^:]+:){3}(...
- 1,907
0
votes
2
answers
2k
views
regular expression with grep not working?
I am running cygwin, grep 2.21 on Windows 7.
I am trying to get all tcp connections from netstat, so I run the following:
netstat | grep -i "^(TCP|UDP)"
Now, it returns nothing, but when I run ...
- 9,733
0
votes
3
answers
622
views
Get specific key value in log pattern using the shell script
My log file has below pattern :-
tx=267c5660-c49a-4ae7-b5ae-c9d43e23b617, rh=163.172.0.0, userId=-1, requestComplete={ requestId=74421156932, entityResourceType=xyz, pageId=homePage, uri=/home/, ...
- 31.9k
1
vote
2
answers
553
views
How to add leading zero's to sequential file names
I have images files that when they are created have these kind of file names:
Name of file-1.jpg
Name of file-2.jpg
Name of file-3.jpg
Name of file-4.jpg
..etc
This causes problems for sorting ...
- 13
0
votes
2
answers
285
views
Grepping for the form action= part of html pages
I am trying to grep the parts of an html form, specifically the action part i.e. <form action = ….
I originally tried:
grep -E -e 'form\s*action\s*=.*[.]html' ./*
but it did not work (despite the ...
- 19.3k
2
votes
1
answer
190
views
Not able to extract with grep
> <img alt="Citizen Kane Poster" title="Citizen Kane Poster"
src="https://images-na.ssl-images-amazon.com/images/M/MV5BMTQ2Mjc1MDQwMl5BMl5BanBnXkFtZTcwNzUyOTUyMg@@._V1_UX182_CR0,0,182,268_AL_....
- 316
0
votes
5
answers
98
views
Regex to match text between two delimeters?
Heres an example of the things I need to match on a request that I have stored as a text:
[{"id":"896","name":"TinyAuras","author_id":"654","author":"Kurisu</span></strong></span></a>","...
- 777
1
vote
3
answers
93
views
Rename batch of specific files using bash
Say I have a folder which contains files like this: a constant prefix and then an underscore and some description which is different for every file:
constantnamehere_description1.doc
...
- 1,250
0
votes
3
answers
149
views
How to verify the output of a command in shell?
I need to verify if a particular file system has the noexec option set.
For example /dev/shm. I am running the command in the following manner:
get_val=$(mount|grep /dev/shm )
if [[ -z get_val ]] ; ...
- 1,362
0
votes
1
answer
83
views
Parsing files to copy the ones that match my criteria
I have files that are to be copied and removed on different days and different times, and the criteria is part of the file's name. I was thinking of using Bash and regex to combine various variables ...
- 2,211
1
vote
1
answer
67
views
"email ip" regex into log file
I have a logs file looking like:
'User_001','Entered server','[email protected]','2','','','0','YES','0','0',','0','192.168.1.1','192.168.1.2','0','0','0','0','0','0','0','0','0','1','0','','0','0','0','...
0
votes
1
answer
48
views
How to capture from regex in bash?
I am running this piece of code so that I can match the branch name with a pattern and create port based on which:
nano test.sh
#!/usr/bin/env bash
branch="3.2.1"
re='([0-9]+)\.([0-9]+)\.(...
- 2,154
0
votes
3
answers
26
views
Does exist more convenient manner to get the svn revision number output from svn log?
please see below :
echo "r22543 | foobar | 2016-03-08 17:17:02 +0800 | 1 line" | egrep -o 'r[0-9]+' | egrep -o '[0-9]+'
22543
Does exist more convenient manner to get the svn revision number?
- 8,349