Also known as regular expression or regexp, a description of a set of strings, often used for searching and validating strings.

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how to filter text file on the basis another text file.

I have two text files . One is wordlist and another one is file to be filtered. I want to remove or delete all the lines or links from the file if the line has any word from word list anywhere in ...
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2answers
26 views

Converting C# Regex To PowerShell

Our Software department has a program that runs SQL scripts from a certain folder. I now need to replicate this functionality in PowerShell. C#: var commands = Regex.Split(sqlFileText, @"^\s*GO\s*$",...
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1answer
16 views

Having trouble with regex for Treesize

I'm trying to find all documents that contain the following symbols in their name using Treesize Pro's file search: # % : • For whatever reason, the normal wildcard search function won't process *...
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4answers
338 views

Permanently set `find` regextype

GNU find allows the use of different regex formats via the -regextype option, but as far as I can tell I have to type out -regextype <whatever> every single time which is onerous. If one wants ...
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2answers
111 views

RegEx string formatting in Notepad++

I'm pretty good in RegEx, but there's one thing I can't seem to figure out how it works. How would one search/replace in NotePad++ and make sure that the output has a fixed length, while the input ...
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1answer
17 views

List all regex matches, one per line of output

I know that I can find regex matches using egrep. My need is a bit more esoteric: I need to list all regex matches, one per line of output. So, assume a file containing the following: This is just ...
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0answers
30 views

Bulk renaming of files in window which matches a certain expression [closed]

I want to rename all files in a folder in Windows 7. All files which have the last character of the filename as 5, the last character must be replaced with 3. I used the command rename *5.abc *3.abc ...
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1answer
25 views

Adding Single quotes at the beginning and end of each string

I want to add single quotes at the beginning and end of all the strings in the given list and each item should be separated by a comma in notepad++ ANAND GABRIEL INDIA LIMITED NARMAC MOTHER DAIRY ...
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1answer
24 views

Word, Regex for brackets, word, whitespace or lf

In Word, I would like to use the regular expressions to match "Po" followed by either a whitespace or end of line character. [[Policy.PolicyNumber]] [[Po [[Po John So in the above example I would ...
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1answer
1k views

How to use regex quantifiers to rename multiple files with zmv?

I have the following files in a single directory: 1-1 - different text for each file here.txt 1-2 - different text for each file here.txt . . 1-9 - different text for each file here.txt 1-10 - ...
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2answers
47 views

lnav not recognizing our logs. Custom format not seeming to be applied.

I am working on adding a lnav format to parse the logs of my companies java application. I am running into difficulty getting lnav to recognize them. Here is what my json format file looks like so far:...
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1answer
5k views

Regular Expression to match zero or more spaces in Microsoft Word

I hope I'm just missing the obvious here, but how in the world do I match zero or more spaces with Microsoft Word 2010's "Regex" engine? As a silly example, I want to match all of the following in a ...
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2answers
31 views

Using Notepad++ Regex to remove anchors

I've tried looking at other answers for this and my brain just explodes when I try and read anything on Regex, I just cant comprehend it, no matter how many times I read it, or how slowly. Im trying ...
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1answer
19 views

Regular expression not working as expected for special characters

I have a Wireshark capture and I'm trying to create a display filter [Wireshark documentation] that finds XML documents which contain the term @@ V? (at-at-space-V-questionmark). The documentation ...
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3answers
67 views

Notepad++ Find and Replace Expert Suggestion

I need help with Find and Replace in Notepad++. Example: $250 'Hello 1' Take '____' $500 'Hello 2' Take '____' $1000 'Hello 3' Take '____' Imagine there are thousands of these entries going up to ...
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2answers
63 views

How to split big txt file \n and not

I want to split a txt file. First I open the txt file with notepad++ and I change from this \r\n to this \n , then I want to split them in 10 pieces and for that I use a tool called split or join and ...
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votes
3answers
5k views

Remove all files containing a pattern

Suppose I have a directory with files and subdirectories underneath it. Some of the files contain a pattern "^File:" in their contents. Is there some way I can use grep and a bash command to remove ...
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1answer
22 views

Regex positive lookahead when lookahead data doesn't exist (PCRE)

I'm trying to match out a string which will have a format similar to the following: username=joe password='this! is a password with "quotes" and spaces#913 custom1 customd afd weirdhuh? custom1=...
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0answers
15 views

start scanning from next page number (incrementing page numbers of files)

I am scanning a couple of my notes. The are saved as note1.jpg,note2.jpg,note3.jpg and so on the scanning happened smoothly till note48.jpg, some how some thing at this instant went wrong and then now ...
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2answers
15 views

Find highest numbered files in directory

Scenario: A backup system creates rar archives and splits them in 100 MB parts. I would like to find the highest numbered files within this directory. For example in- and output: Input: ...
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2answers
38 views

bash regex for a file name

I'm really not that good with regex but I thought I'd be able to pull this off since it's not that difficult. I'm using find to see if any file that matches the regex exists in that dir. The string ...
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2answers
18 views

Adding specific line after findinga pariticular line

I have huge codebase containing 400-500 files. In most of the files we have this kind of lines, <cfcatch type="any"> / <cfcatch type="database"> / <cfcatch> etc. So the common ...
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1answer
28 views

limiting regex search range

I have a long list of words, characters, and new lines, how do tell the regex to only search the text between TWO EXACT WORDS on the list? This is what I came up with but it does NOT stop searching" ...
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1answer
22 views

Regular expressions in procmail

I have a problem with backscatter to randomly generated fake-from-adresses on a domain with a catchall. The fake-alias is using a scheme, using egrep with the regexp ^To:.*.[A-Z].[a-z].*[A-Z].[a-z].*...
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1answer
35 views

Regex between two patterns that matches only the first occurence of the second pattern

I have the following text: 676 ##$a610$v22 <coded_13></coded_13> 700 #1$3184149134rtrtrtrtrtrtrtrt$4210 <coded_27></coded_27> ILeclerc, Michel (1952-....) <coded_27><...
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1answer
39 views

Batch: Return the matching lines from pipe's output to the console with regex

I have the following domain checking bash script in Linux: #!/bin/bash TLD='.com' while read -r domain; do whois -H $domain$TLD | grep -oPaq '^.*(Creation Date|record created).*$' if [ $? -eq 0 ...
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5answers
72k views

Matching only the first occurrence in a line with Regex

I am completely new to regex and I would greatly appreciate any help. The task is simple. I have a CSV file with records that read like this: 12345,67890,12345,67890 12345,67890,12345,67890 12345,...
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2answers
24 views

I need help building a regex for a grep to show only the path to running versions of java

I need help building a grep from ps -ef to return only java paths. Say we have the following runnning process: bash> ps -ef | grep java user pid# 1 1 00:00 ? 00:04:00 /path/to/java/...
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0answers
20 views

Efficient Find/Replace Heading in MS Word that Contains text

I have multiple Heading 3s in MS Word. Some of them contain specific text: "MYTEXT". I want to find all Heading 3s that include "MYTEXT" and remove that word and all text to it's left while ...
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0answers
11 views

Regex: Define multiple whois servers for a single TLD in whois.conf

A single TLD is defined by this way in whois.conf for GNU whois: # whois configuration file # # This file can contain details of alternative whois servers to use if # the compiled in servers are not ...
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3answers
9k views

Extract/delete all other text than whats inside quotation marks (“ ”), and after string

I'm have a very big data output in a .txt file that looks like this: value1="1",value2="2",value3="test3",value4="4" value1="1",value2="2",value3="anothertest3",value4="4" value1="1",value2="2",...
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19 views

Can I use grep to pull out a particular pattern from a file / number of files, using regex perhaps?

I have a file with a load of errors in it. I used grep to pull out all the JSONExcpetion Errors and save them in a new file like this: sudo grep -Hrn "JSONException" 2016-* >> jsonexception.txt ...
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1answer
20 views

regexp search and replace for bash variables

A number of my bash scripts need tidying up before sending them round. One of the thing I would like to do is to use curly braces for all variable names. So everywhere it says $PWD should be changed ...
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2answers
96 views

Extracting named groups of regular expression in LibreOffice Calc

In Python 3, it is quite easy to extract text from named groups as shown in the following example: import re myStr = r"4000/2000/5000/7000" reObj = re.compile(r"""(?P<g1>\d+) # a capturing ...
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1answer
19 views

RegEx with Word 2013. Match string AFTER known word to End of Line or <table>

I'm using the Find and Replace feature in a large word document I have. I need to find the word REMARKS: (all bold and upppercase). REMARKS: THIS IS SOME IMPORTANT DATA At then end of that line ...
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1answer
96 views

Transform a CSV with Notepad++

Suppose I have a CSV file like this: 1,"abc",,,, 2,"def",,,"ghi", 3,,"jkl",,,"mno" Now I need to transform it in 3 steps: Replace all empty spaces with the String NULL Add at the beginning of ...
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3answers
42 views

Notepad++ regex not working

I am trying to use Notepad++ and regular expressions to remove all XML from Windows' events. My regular expression is as follows: Event Xml:(.|\n)+?Event>\n Example Windows events are as ...
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2answers
35 views

How can I delete everything else from my txt except hungarian texts?

I have a localisation file from a game, and unfortunately, this file conain all localized language, but I only need is, the hungaryan texts from them. I would like to make a video series from this ...
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0answers
16 views

Automatically Monitor and Rename Files with Regex

Is there a tool that allows you to monitor a folder for new files and apply a regular expression to automatically rename the files?
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0answers
11 views

Possible to use RegEx and Notepad++ to compress repeated words to word counts

I would like to use NotePad++ Find and Replace with RegEx to essentially compress data in a text file. I have data which contains repeated adjacent words such as: [dog][cat][cat][dog][cat] I would ...
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2answers
2k views

How to search and replace any digit at beginning of an MS Word paragraph?

Trying to do a find a replace on any paragraph that begins with a number. Tried this in Find and Replace: Find what: (^13)(^#) But get the error ^# is not a valid special character for the ...
27
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6answers
8k views

Substitution in text file **without** regular expressions

I need to substitute some text inside a text file with a replacement. Usually I would do something like sed -i 's/text/replacement/g' path/to/the/file The problem is that both text and replacement ...
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votes
1answer
14 views

How to find & replace a pattern with string in ruby?

My file is: [root@test etc]# cat nrpe.cfg command[check_users]=/usr/local/nagios/libexec/check_users -w 30 -c 35 command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c ...
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1answer
23 views

Bash Regex oddity when using =~ operator

Consider this code: s1="1,2,3,4"; \ s2="1,2,3"; \ sP='^(([1-9][0-9]{0,},){1,2}){1,2}$'; \ [[ "${s1}," =~ $sP ]] && echo "\$s1 matches"; \ [[ "${s2}," =~ $sP ]] && echo "\$s2 matches,...
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3answers
2k views

What's is the easiest way to append ';' to the end of lines which contain the char ':'?

I have a text file, whose content is like: body font-size: 12px color: blue td font-size: 14px ... I want to append ; to the lines which contain :, so the content will be: body ...
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1answer
14 views

Which of the following use of anchor is correct in regex using grep?

Both of the below commands gives the same output, however which one is the correct method to use it? grep ^'\<that\>' file.txt Searches for the line which has that as the first word grep '^\&...
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34 views

JFlex: multiline string literal (multiline bash commands)

I use JFlex to describe a file format. It uses a literal string to describe the multi-line commands (as in bash). I do so: STRING_LITERAL= "\"" ([^\"])* ("\\\n"|"\"")? Text example: CMD "git ...
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0answers
37 views

fail2ban does not ban IP although there is one failed regex in table

I don't know why fail2ban not adding the bad ip into iptables rules. Here is my setup. /etc/fail2ban/filter.d/http-get-dos.conf [Definition] failregex = ^<HOST> -.*\"(GET|POST).* ignoreregex = ...
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1answer
5k views

Perl for matching with regular expressions in Terminal?

I'm trying to familiarize myself a little with Perl to use for regular expression searches in Terminal (Mac). Now, I'm not really looking to learn Perl rigourously, just trying to find out how to do ...
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19 views

Notepad++ If a line contains a word replace line a certain distance below with a phrase

I'm pretty sure this is possible, and I think it involves Regex, but I have no clue how regex formatting works, and I haven't been able to find the expression I'd need anywhere yet. Basically I've ...