Regular Expression Patterns Examples

http://regexlib.com/DisplayPatterns.aspx

How to Set Environment Variable in .htaacess

SetEnv SERVER_ADMIN webmaste@tstindia.com
in .htaccess file
 write php script

<?
echo "<pre>";
print_r($_SERVER);
echo "</pre>";
?>

output

Array
(
    [DB_USER] => root
    [DB_PASS] => 
    [SERVER_ADMIN1] => webmaste@htaccesselite.com
     [HTTP_HOST] => 192.168.2.61
    [HTTP_USER_AGENT] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14
     [HTTP_ACCEPT] => text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
    [HTTP_ACCEPT_LANGUAGE] => en-us,en;q=0.5
    [HTTP_ACCEPT_ENCODING] => gzip,deflate
     [HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.7
    [HTTP_KEEP_ALIVE] => 300
    [HTTP_CONNECTION] => keep-alive
    [HTTP_COOKIE] => poll=Voted; style=null; SMFCookie575=a%3A4%3A%7Bi%3A0%3Bs%3A1%3A%221%22%3Bi%3A1%3Bs%3A40%3A%22fad077d4e426943b32e462a38d114fbd337b3fc4%22%3Bi%3A2%3Bi%3A1399441877%3Bi%3A3%3Bi%3A0%3B%7D; __utmz=157290106.1207050145.1.1.utmccn=(direct)|utmcsr=(direct)|utmcmd=(none); __utma=157290106.1426920627.1207050145.1210759060.1214305026.6; WT_FPC=id=247bbbe7e73420e83c21209459354270:lv=1209460134764:ss=1209459354270; SMFCookie956=a%3A4%3A%7Bi%3A0%3Bs%3A1%3A%221%22%3Bi%3A1%3Bs%3A40%3A%22e53f2ea11a88993a04d0837b81ccb7c4c3699121%22%3Bi%3A2%3Bi%3A1399292921%3Bi%3A3%3Bi%3A0%3B%7D; PHPSESSID=e2536b9303b16fb31076d6a8b1b3ed1d; USRNIM=; PASSVIN=; REMIZ=; SESSd1d6ec85abd01c207c8a130a38579464=5bf10fdb87e2d001299a0acb37206889; 5cd4ea95eb59d31cfbbd83d1c02f8921=8b024a3149f666280b6f54fe21cbc471
     [HTTP_CACHE_CONTROL] => max-age=0
    [PATH] => C:\Perl\site\bin;C:\Perl\bin;E:\ruby\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Common Files\Teleca Shared;E:\ruby\bin
    [SystemRoot] => C:\WINDOWS
     [COMSPEC] => C:\WINDOWS\system32\cmd.exe
    [PATHEXT] => .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.RB;.RBW
    [WINDIR] => C:\WINDOWS
    [SERVER_SIGNATURE] => 
Apache/2.2.4 (Win32) DAV/2 mod_ssl/2.2.4 OpenSSL/0.9.8e mod_autoindex_color PHP/5.2.3 Server at 192.168.2.61 Port 80
 
    [SERVER_SOFTWARE] => Apache/2.2.4 (Win32) DAV/2 mod_ssl/2.2.4 OpenSSL/0.9.8e mod_autoindex_color PHP/5.2.3
    [SERVER_NAME] => 192.168.2.61
    [SERVER_ADDR] => 192.168.2.61
     [SERVER_PORT] => 80
    [REMOTE_ADDR] => 192.168.2.61
    [DOCUMENT_ROOT] => C:/xampp/htdocs/
    [SERVER_ADMIN] => admin@localhost
    [SCRIPT_FILENAME] => C:/xampp/htdocs/server.php
     [REMOTE_PORT] => 1575
    [GATEWAY_INTERFACE] => CGI/1.1
    [SERVER_PROTOCOL] => HTTP/1.1
    [REQUEST_METHOD] => GET
    [QUERY_STRING] => 
    [REQUEST_URI] => /server.php
    [SCRIPT_NAME] => /server.php
     [PHP_SELF] => /server.php
    [REQUEST_TIME] => 1215003903
    [argv] => Array
        (
        )

    [argc] => 0
)

Mozilla 3.0 for windows and Ubuntu

Use below link to download Mozilla 3.0

http://www.mozilla.com/en-US/ --- windows

Ubuntu --follow the steps mentioned in the below url,it will do all the backups then it will install
Here one change we need to do during the installation
sudo tar -C /opt -jxvf firefox-3.0b2.tar.bz2
instead of this make modification like this
sudo tar -C /opt -jxvf folder/firefox-3.0b2.tar.bz2

Refer:
http://www.ubuntugeek.com/howto-install-firefox-3-beta-2-in-ubuntu-710-gutsy-gibbon.html

Htaccess

Creating A .htaccess File

Creating a .htaccess file may cause you a few problems. Writing the file is easy, you just need enter the appropriate code into a text editor (like notepad). You may run into problems with saving the file. Because .htaccess is a strange file name (the file actually has no name but a 8 letter file extension) it may not be accepted on certain systems (e.g. Windows 3.1). With most operating systems, though, all you need to do is to save the file by entering the name as:

".htaccess"

(including the quotes). If this doesn't work, you will need to name it something else (e.g. htaccess.txt) and then upload it to the server. Once you have uploaded the file you can then rename it using an FTP program.

Start like this:

You can use custom error pages for any error as long as you know its number (like 404 for page not found) by adding the following to your .htaccess file:

ErrorDocument errornumber /file.html /*optional

RewriteEngine On .....this is line should be
 there in all htaccess file.

eg:

ErrorDocument errornumber /file.html
RewriteEngine On
RewriteRule ^article/([0-9]+)/? article.php&article=$1 [R]

.htaccess file to stop the directory list from being shown:

Options -indexes

You can block an IP address by using:

deny from 000.000.000.000

To allow : 
allow from 000.000.000.000 

To denyl all :
deny from all