Questions tagged [regular-expressions]

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Testing Regular Expressions

I am trying to learn regular expressions, and came across some examples online. Trying to put things together, I inputted this into bash ^(([a-j][a-j]?)|(3[a-j][a-j])$ It returns the following error ...
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Postfix test: I can't forwarding outgoing emails

I am configuring a Postfix server in a test environment. It can only forward local emails. Outbound email must be redirected to /dev/null or to a local account. I found a solution on your forum but it ...
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Postfix header_checks add X-Mailgun-Tag

I am trying to add in the postfix header_checks, using PREPEND, some X-Mailgun-Tag headers. When using the following expressions in the header_checks, it applies without issues to all domain emails. /^...
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Regular expression for location with slash at the end

I have location location ~ /(apple|club|car|fly|fitness|nivea|nesquik) { alias /srv/static-pages/$1.html; } I tried location ~ /(apple|club|car|fly|fitness|nivea|nesquik)(\/)* { alias /srv/...
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Regular Expression in EMEditor

I am trying to make a simple find > replace regular expression. This does work fine in https://regexr.com/ to find this comment below. However the editor I use is EMEditor that i try to make a find ...
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Nginx isn't passing on the last forward slash of an arg to a script

Have an issue where nginx isn't passing on the last forward slash of an arg to a script Example https://xxxx.com/test_t/company/Default/icon_category/Hotel.png Rewrite: location / {​​ rewrite "^/(...
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Find and Replace using Regular Expression

I try to find a way to find and replace using EMEditor and a Regular Expression. I try to applu this for the item below: <?php /*f04b8*/ @include "\057mn\164/r\141id\057ho\155e/\164ap\151om\...
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Regular expression to find content that is sandwitched between 2 symbols

This might have been asked before but I cant find a solution. I am looking for a simple "Regular Expressions" search pattern to find something in my PHP files. I am looking for the following ...
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6 votes
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33k views

Extracting part of the string using Ansible regex_search and save the output as a variable

I'm having a content like below inside a file. dataDir=/var/lib/zookeeper 4lw.commands.whitelist=mntr,conf,ruok,stat syncLimit=2 I wanted to read the value for dataDir using Ansible and set it to a ...
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Find with regex not working on CentOS 7 [closed]

I have problem with find and regular expression. I would like to find files in /etc, which name begin of a or b. I tried this commands: find /etc -type f -regex '^a' find /etc -regextype sed -regex &...
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Why my Fail2ban regex doesn't find matches?

I have tried many regular expressions in fail2ban config, but it never return any matches. Line example: [2019-12-10 10:45:38] NOTICE[15077] res_pjsip/pjsip_distributor.c: Request 'INVITE' from '<...
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738 views

Postfix header_checks not working: Invalid preceding regular expression

I have a problem with Postfix. Recently we are receiving mail messages with malformed "From:" headers as these: From: "Name Surname <user@good-domain.com>" <user2@bad-domain.com> From: "...
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116 views

fail2ban filter for ical regex

i am trying to get a regex for an ical service on my host working without success. This is a part of the logfile: Tue Jul 23 13:55:23 2019: ical|T720] [info ] Accepted connection from [::ffff:2.3.4....
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cron expression to execute on the "second last working day" of the month

I need your help to contruct a cron job to run the second last working day of every month. I can do LW as shown below but i am not sure how to do second last. I need your help and advise here please. ...
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2 answers
191 views

regular expression that has /admin in the middle and whole string ends with specific format

I am trying to write a regular expression such as it has /admin in the middle and ends with .css or .js or other formats. http://example.com/admin/static/style.css (SHOULD WORK) http://example.com/...
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Add rule in .htacces only if domain name begins with <regular-expression>

I have to add a rule in a server that host many sites. This rule must be added only in those .htaccess files that belongs to a site with domain beggining with "dev-" or "review-". I have this: #!/...
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2 votes
1 answer
357 views

How to remove mass trailing slashes(Nginx)

I need to remove mass trailing slashes, now I have rewrite ^/(.*)/$ /$1 permanent; So www.example.com/ becomes www.example.com. It's good, but when I go to www.example.com/// (any amount of slashes)...
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1 answer
4k views

postfix smtp_generic_maps with regular expression

I just started playing around with sender address rewriting with postfix. I run a server with debian-7.11 and postfix-2.9.6. Content of /etc/postfix/main.cf: [...] smtp_generic_maps = hash:/etc/...
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6k views

Ansible replace. Replace part of the regular expresion

I create a playbook that will harden my linux servers. Part of the process is to replace the umask in the default profiles. So, I have created this task: - name: Change the umask for default profiles ...
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2 answers
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Finish processing rewrite directives in location and return 301

I have the following in my nginx.conf: location ~* /collections.*?products/([^/]+)/?$ { rewrite ^/collections.*?products/([^/]+)/?$ /$1.html; rewrite ^([^_]*)_([^_]*)_(.*)$ $1-$2-$3; ...
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1 vote
1 answer
382 views

Modify puppet nodes.pp with regex based on network (facter) subnet coverage - needs peer review

For the puppet experts out there, I am trying to modify my node.pp based on the facter network. Example, I would like to have subnets 10.10.10.0 through 10.10.10.255 and 192.168.2.0 network to get the ...
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2 votes
1 answer
374 views

Multi-line PCRE w\ lookhead, count matches

I am trying to perform a regex that matches if both the word cat AND dog are in the regex with multi-line support matches cat asdjfaldsfj dog #### does NOT match cat adfasdf8989 #### matches dog ...
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2 answers
734 views

Regex works everywhere ( tried regex101 and regstorm.net) except Powershell

I have tried various different combos and already checked other similar posts, but can't find my answer. I have a .config file and I need to exclude the comments from the file when I do my search, ...
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-1 votes
1 answer
154 views

validate file content with bash Regular Expressions + Linux

how to validate the following file content that should be include single integer/float number by bash Regular Expression or any other idea with awk/sed cat /var/VERSION/Version_F35_project_usa 2....
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5 votes
2 answers
9k views

nginx: multiple matching location blocks

I try to set max-age header directive and Content-Disposition "attachment" as follows: location / { # set up max-age header directive for certain file types for proper caching location ~* \.(...
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-2 votes
1 answer
556 views

Sed replace path for directory from special file with delimirers slash

i should change on parameter to other from template file in linux. sed -e "s/\${dir}/<in this place i should input path, like /home/username>/" /etc/nginx/site.conf But it does not work. How ...
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3 votes
3 answers
47k views

Redirect of all the URLs that contain 1 word in specific, but that do not contain other words

I am migrating my website to another platform, but while I finish developing all the pages of the new website, I need my users to navigate between the 2 platforms. So I need to make a 301 redirect of ...
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3 answers
1k views

Logstash Grok Parsing Failed

I need to match this entry 2015/10/30 23:58:21 pid 22223 testuser@testserver.example.com 192.168.0.1 [p4/2012.2/LINUX26X86_64/536738] 'test-monitor show' To match this I wrote this Regex P4_DATE (?...
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2 answers
2k views

Regular expression for second and third domain level with hyphens

I have some smart script, that check name of server and get domain name. For example, i have name of server: example.ru01. I need to get: example.ru My scipt: #!/bin/bash hostname=example.com01 echo ...
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1k views

Doesn't work regular expression for domain with hyphens

I have some smart script, that check name of server and get domain name. For example, i have name of server: example.ru01. I need to get: example.ru My scipt: #!/bin/bash hostname=example.com01 echo ...
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2 votes
1 answer
1k views

postfix virtual map regular expression

I am trying to create a small virtual_alias_maps fiel for postfix-pcre: .*@subdom\.domain\.com test@other.org But I get this error: warning: pcre map /etc/postfix/virtual, line 1: unknown regexp ...
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1 vote
1 answer
953 views

Nginx rewrite rule remove subfolders

I'm trying to setup a nginx rewrite rule but can't figure out how to get it working. I want to redirect all urls https://domainname.com/archives/year/month/date/postname to https://domainname.com/...
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-1 votes
1 answer
861 views

sed + replace value default in grub.conf [closed]

I want to change the default value on all machines to default=0 default value could be any integer number how to set in the sed syntax that default could be any number my example ( not working ) ...
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754 views

nginx location regex not working

I'm trying to setup location directive to match my request but can't get it working. Below is my sample request: /APP/public/api/v1/item/100/type location ~* ^/APP/public/api/v1/item/(.*)/type { ...
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3 votes
1 answer
3k views

How can I add values to structured data with rsyslog?

Our logs are sent from our applications to rsyslog running on the same host. Rsyslog then forwards the messages to Sumo Logic. We need to add some metadata to our log messages in the structured data ...
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2 votes
3 answers
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Regular expression in not working in dnsmasq config

I have dnsmasq version 2.66 installed on CentOS. As per release notes, dnsmasq supports regular expressions starting 2.60 I have following enty in my config file: address=/:clients[0-9]*\.google\....
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1 vote
1 answer
471 views

Exchange 2013 RegEx transport rule

I am looking to create some transport rules for outgoing email based upon AD properties. eg. Phone: 123-456-7890 Where the actual inserted code looks like "Phone: %%PhoneNumber%%", retrieving the ...
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1 vote
1 answer
2k views

Nginx Config Location Regex With Language Code In Url

Trying to achieve constant language code in url's 1st segment with nginx regex location configuration and could not find the correct syntax. Necessary result: example.com stays example.com example....
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1 answer
6k views

regular expression to match condition of character if exists should always be followed by a pattern

I need a regular expression with the condition that ..if there is an occurrence of character | one time ;the pattern immediately following is ARGS or URL For example abcd ab|ARGS cd|URL etc is ...
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1 vote
1 answer
825 views

Nginx proxy for CNAME setup

My application serves landing pages and we need users to custom CNAME it eg: {{userdomain}}.myapp.com/{{pageid}} serves the landing pages today. User wants to map it to {{landing}}.theirsite.com So,...
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3 votes
1 answer
2k views

Adding Curly Braces to Map block in nginx

I am having a problem trying to get the following configuration to work. Every time I run the config test I get a failed pass. To start off let me show you a working configuration location / { ...
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1 vote
1 answer
1k views

How to using sed to change the last character from a match line

How to using sed to change the last character from a match line ? Exemple: /etc/network/interfaces auto eth0 iface eth0 inet static address 150.0.3.50 netmask 255.255.255.0 ...
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789 views

How to escape pipeline char in Windows shell?

I need to specify a regular expression that includes | character to findstr command: processtext.exe | findstr /R "Hello|Bye" How do I escape it? \| does not work. Quotes fix issue with pipelining ...
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131 views

Manage several sub domains with nginx

I like to handle different sub domains in my Nginx server, this is my config file (partially) server { listen 80 default_server; listen ...
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2 answers
1k views

How to exclude a certain string in a search pattern

There are several exception messages in catalina.out file of tomcat server just like - java.lang.NullPointerException org.springframework.beans.factory.BeanCreationException java.lang....
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1 vote
1 answer
1k views

htaccess rule for url not ending with certain words

I need to rewrite few urls if those url not ending with certain words. For example, i need to rewrite following url /category1/subcategory1/aproduct-url-title to /category1/fixedword/aproduct-url-...
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2 answers
2k views

Zabbix doesn't update value from file neither with log[] nor with vfs.file.regexp[] item

I am using Zabbix 2.2. I have a very specific environment, where I have to generate desired data to file via script, then upload that file to ftp from host and download it to Zabbix server from ftp. ...
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1 vote
1 answer
558 views

SetEnvIfNoCase directive match ip failing

I'm trying to set some specific headers based on the client IP address via an Apache reverse proxy. I try to use SetEnvIfNoCase/SetEnvIf but I somehow fail to write a correct regular expression :( ...
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1 vote
2 answers
12k views

Zabbix 2.0: Regular Expression to extract value from a String for a trigger?

I am using Zabbix 2.0.4 to monitor several Java applications. Most values are exported via JMX. One of those exported attributes is a string that is constructed like this: [IP_1],[port_1],[ms_time_1];[...
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1 vote
2 answers
5k views

Regular expression for monitoring HTTP errors in apache logs

I'm looking for a regular expression that I can use to scan for HTTP errors in my standard apache log files. I'm interesting in matching all lines that don't have an HTTP 200 or HTTP 204 return ...
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