When asking regex questions, always add the tag for the specific programming language or tool (e.g., Perl, Python, or Java; vi, emacs, or ɢɴᴜ grep; etc.) you are using.

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2answers
193 views

Regular Expression for “AND”?

Let's say I gave you the following text: allow_httpd_anon_write --> off allow_httpd_mod_auth_ntlm_winbind --> off allow_httpd_mod_auth_pam --> off allow_httpd_sys_script_anon_write --> ...
2
votes
1answer
2k views

Regex for multiple sshd Received disconnect from … [preauth]

What fail2ban regex would catch logs like these? Apr 9 08:48:28 server sshd[1856]: Received disconnect from 43.255.190.117: 11: [preauth] Apr 9 09:06:05 server sshd[1936]: Received disconnect ...
2
votes
1answer
494 views

How to make comments in logcheck files?

how can I add comments to logcheck ignore-rules? Things I tried so far: # seems to match single # characters instead of starting a comment empty lines matches against everything $ matches against ...
2
votes
2answers
7k views

nginx simple regex location

I need to set a location param in nginx if the first 5 digits of the url are numbers. site.com/12345/ or site.com/12345 But I can't for the life of me seem to get the correct regular expression. ...
2
votes
3answers
262 views

How do I find this string?

I'm trying to match these file names with the find command: 4702011-10-21CR719557-R85262-ALPHA.jar 4702011-10-21CR719557-R85262-BETA.jar I'm reasonable familiar with Java-Perl regex syntax. ...
2
votes
2answers
2k views

Postfix virtual domains: how to accept all subdomains except for two?

Assuming my Postfix server serves the domain example.com, I want it to accept mail for all the subdomains of example.com except for mail.example.com and in.example.com. At first I've tried using a ...
2
votes
3answers
197 views

Regex Replace Append Filename

How can I append characters to a files name in linux, using a regex? I've seen these two posts http://stackoverflow.com/questions/6985873/change-names-of-multiple-files-linux How to rename multiple ...
2
votes
2answers
744 views

nginx rewrite regex for API versioning

What I want is for the first to be turned into the second.. /widget => /widget/index.php /widget/ => /widget/index.php /widget?act=list => /widget/index.php?act=...
2
votes
1answer
4k views

Regular expressions in server_name with Nginx vhost

I have something I'm trying to do with Nginx. Say I have a few users and a subdomain, and each user has a directory at /home/dev/sites/USER_ID. I would like for USER_ID.dev.example.com to point to ...
2
votes
1answer
123 views

Memory usage REGEX

Could you help me to modify the following one-liner to get more precise memory usage - right now it's just an integer I would like to include first value after coma. free -m | awk '/Mem:/ {tot = $2;} ...
2
votes
2answers
8k views

How can I count instances of a regex match in a log file using PowerShell?

I have a very large log file in which I need to count the occurrences of all the variations of a particular string; that is: There are a large number of file IDs that appear in the format AA000####. ...
2
votes
2answers
944 views

Debugging nginx URL rewrite: How do I figure out where the problem is?

I have a specific URL pattern on a site which needs to be redirected to the HTTPS version. This is a Django site; Nginx checks each URL in memcached, and if it doesn't find a cached version it proxies ...
2
votes
4answers
5k views

Perl in place edit within a script

I need to edit a file in place within a perl script, so the oft used one liner: perl -p -e s/<value>/<value>/ig will not work for this situation. How do I get the same results from ...
2
votes
1answer
1k views

Reg Exp for URL in HAProxy

I'm trying to build a reg exp for haproxy that will match the second URL and direct it to a different acl than the first: mysite.com/path/ mysite.com/path/something_random The issue is that my ...
2
votes
1answer
481 views

htaccess email regex

I am trying to write a patter in such a way that this link : http://www.mysite.com/link/go/emailadress@gmail.com is interpreted like this : http://www.mysite.com/process.php?email=emailadress@gmail....
2
votes
1answer
138 views

Recursively search and replace the contents of multiple file types

I have thousands of web files(*.php, *.htm, *.html, etc) that contain an absolute path(http://site.com/sites/etc). I need to scan a directory and all subdirectories for the various file types and ...
2
votes
2answers
4k views

nginx location regex matches directory range

I am trying to set up nginx and I don't get the point how to do the following setup: I have an URL http://somehost.com/foo/bar/123/xxx_xxx that needs to be passed to different backends depending on a ...
2
votes
1answer
335 views

encapsulate text in quotes with sed buffer

I need to do a search and replace to encapsulate a variable string in single-quotes (php object notation into php array notation) such that the following block: $my_trip->trip_id = ( $...
2
votes
2answers
1k views

fail2ban regex that uses less CPU?

Using fail2ban, I want to ban these spammers who are sending to a spamtrap address: Oct 27 09:04:22 si68 postfix/smtpd[3240]: NOQUEUE: reject: RCPT from unknown[117.197.114.222]: 550 5.7.1 <...
2
votes
2answers
383 views

URL rewrite on custom Wordpress site

I've been tasked with modifying an existing Wordpress site with URL rewriting. Problem is I've never done this before. I know these rules should go in a .htaccess file in root with something like this ...
2
votes
2answers
1k views

Rsync and wildcards

I am trying to back up both the "Last Session" and "Current Session" files for Google Chrome in one command, but using a wildcard doesn't seem to work. I am trying with the following command rsync -...
2
votes
2answers
130 views

Make shortened and long urls play together on the same domain (RewriteRule)

Long story short, I want to have both example.com/aJ5 and example.com/any-other-url working together. I'm using apache and not very good at writing regex. I have already a global RewriteRule which ...
2
votes
1answer
1k views

Custom logcheck pattern matches using egrep, but logcheck doesn't exclude the relevant lines

We have a custom file for logcheck ignore patterns. Today I decided to add another one but it isn't working as smoothly as I'm used to. What I normally do is craft a regular expression that will ...
2
votes
2answers
483 views

Bash script to create mass series of directories

I need to create a Bash script to go into every user's home folder, seek out a wp-content folder, create a directory uploads under it, and then chmod 0756 uploads. How do I achieve this? I imagine I ...
2
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2answers
143 views

Lex Flex variant that will do the Perl REGEX extensions

I use flex & lex a lot for stripping stuff from e-mail attachments in scritps. I wondered if there are moden versions and variants of the lex programs that have the perl REGEX extensions. I know ...
2
votes
3answers
883 views

AWStats ignore all but one sub directory

I'm using AWStats and I want to ignore everything in a subdirectory except for a particular directory, here is the directory layout: Webroot -dir_1 -dir_2 --subdir_a --subdir_b --subdir_c ... ...
2
votes
1answer
159 views

Use of backreferences in fail2ban filters possible?

From time to time, I see collections of suspect "File not found" errors in my Apache logs, basically using the pattern File does not exist: /var/www/file, referer: http://my.server.com/file In ...
2
votes
1answer
2k views

Nginx - Redirect request by GET parameters pattern

One of my servers was attacked by DDoS a couple of days ago and it lasted for 4 days. Below are the logs snippet of the request: 36.224.180.253 - - [14/May/2013:03:11:46 +0800] "GET //?f5b2fd2f860dc=...
2
votes
2answers
3k views

Nagios check_http - checking tomcat application status with regex & linespan

I wan't to check with our Nagios if a webapplication is running on Tomca7. I decided to use the check_http plugin with regex. I'm parsing the status-page of tomcat and check if column "Running" is ...
2
votes
2answers
65 views

Get Apache2.2 to hide Microsoft documents that are being edited?

I have a htdocs directory where I am serving a few Microsoft Word documents. When someone is editing a document, the name of the document changes to look like something like this: "~$my_document.doc"...
2
votes
2answers
1k views

nginx 0.7.65 rewrite not working for double slashes?

Using Nginx 0.7.65, I spent a few hours trying to get what seemed to be a simple nginx rewrite to work. But the two forward slashes don't seem to work properly: Url Before: http://www.testme.com/...
2
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1answer
1k views

apache2 fails to start due to regex

I recently enabled mod_proxy for apache2, and after having restarted my server from a power outage, the following error arose whenever I attempted to start apache2: * Starting web server apache2 ...
2
votes
1answer
98 views

mod_rewrite with multiple QUERY STRINGS

This is an extension to my question http://serverfault.com/a/761474/77231 I am trying to add an additional QUERY STRING parameter to the URL and change spaces to underscores but am having no success. ...
2
votes
1answer
271 views

fail2ban regex filter doesnt work with nginx log files

I have been banging my head all day trying to match my regex filter to my access.log with no luck. I have installed fail2ban on a gentoo server and its running fine (i manually baned my own IP and it ...
2
votes
4answers
1k views

Sieve: filter subject with regex, file into mailbox named match

I am trying to filter mails by subject with a regular expression. The subjects I want to match are read like [git-foo] some more text where foo is the string I want to check for. I end up with the ...
2
votes
1answer
1k views

How to block all incoming proxy visits except from one specific I.P?

I have a page that is prone to attacks, so, in order to reduce the anonymous attacks, I use this code in my .htaccess which I found online : # BLOCK PROXY VISITS <IfModule mod_rewrite.c> ...
2
votes
1answer
623 views

Sed multi-line replace over escaped strings

I'm attempting to convert a mysqldump output file to PostgreSQL compatible SQL. The issue is in dealing with escaped string values. I need to go from: VALUES('blah blah blah','second string \'with ...
2
votes
1answer
632 views

Regular expression not working on Powershell

Background: I need to match a multiline pattern(?) in a C# source file. The regular expression will be manipulate by Powershell. I have tested and it works on RegexBuddy (with the Dot Matches newline"....
2
votes
1answer
1k views

Weird 404 issue with nginx 's.png'

This URL is invalid: http://mysite.co.uk/assets/images/whymysite/viewoptions.png However, if I replace the 's' at the end before .png, with ANY other standard character (that I've tried so far, it ...
2
votes
1answer
854 views

Why does my SetEnvIfNoCase directive does not match requested URI?

I'm attempting to set up Apache such that various error pages display with headers/footers appropriate to the context of the error. If the user was requesting a corporate page, I want to show the ...
2
votes
2answers
830 views

nginx rewrite config

I'm pretty new to nginx and am trying to setup some pretty simple rewrite rules, but they don't seem to be working. Just for your info, this server { .. } has its server_name domain.com *.domain.com. ...
2
votes
2answers
2k views

apache question mark RewriteRule question

So i am trying to redirect from index.php?action=search&query=search text goes here to search?query=search text goes here i tried this so far but with no luck RewriteRule ^search/? index....
2
votes
1answer
1k views

how to use a rewrite rule to test the date in a cookie?

I found out that you cannot use a RewriteCond backreference as a pattern condition in the next Rewrite Cond... UPDATE: As it turns out, mod_rewrite doesn't expand any variables in the test pattern, ...
2
votes
1answer
147 views

A regexp for finding enums in Delphi source files?

The background is that I have a complicated memory issue in Delphi. But a theory is that an enum of 5 values can be the root of the bug. So my question to you is: How do I write a regexpression to ...
2
votes
1answer
91 views

htaccess regex not processing URLs properly

I'm trying to redirect (or 'rewrite') over 3000 urls for a site where we updated the SEF of most of the content pages to remove an ID number that was not needed/desired. This should be a simple ...
2
votes
0answers
680 views

nginx subdirectory to subdomain icingaweb2

I currently have icinga2 set up with the new icingaweb2 ui. it defaults to the subfolder /icingaweb as follows: location ~ ^/icingaweb/index\.php(.*)$ { # fastcgi_pass 127.0.0.1:9000; ...
2
votes
0answers
70 views

php-fpm: Maintain php_mod logging format

I recently switched all my lab servers from apache pre_fork/mod_php to apache worker/fcgi/php-fpm, and after getting everything set-up correctly, I noticed one last issue; php-fpm is adding it's own ...
2
votes
0answers
93 views

Unable to match expression inside If directive no matter what

I have been trying for the past 3 hours trying to match an if statement to define a variable within httpd.conf with no success: <If "%{HTTP_HOST} =~ /[a-z]+/i"> Define test_value "A" </If&...
2
votes
1answer
3k views

nginx return 301 / redirect

among all 'redirect in nginx' questions I couldnt find how to redirect (using return 301 and beteer no ifs) using regexps. I have a link to my website and I'd like to remove parameter a the end: ...
2
votes
0answers
54 views

List subfolders somewhere in the path with rsync

I'm developing a program, that will recursively "walk" through Linux repositories, look for PXE-related files and create gPXE configs. I met across a problem with the structure of Ubuntu catalogs on ...