If you are looking for the examples of URL rewriting then this post might be useful for you. In this post, I’ve given five useful examples of URL rewriting using .htacess. If you don’t know something about url rewriting then please check my older post about url rewriting using .htaccess.

Now let’s look at the examples

1)Rewriting product.php?id=12 to product-12.html

It is a simple redirection in which .php extension is hidden from the browser’s address bar and dynamic url (containing “?” character) is converted into a static URL.

RewriteEngine on
RewriteRule ^product-([0-9]+)\.html$ product.php?id=$1

2) Rewriting product.php?id=12 to product/ipod-nano/12.html

SEO expert always suggest to display the main keyword in the URL. In the following URL rewriting technique you can display the name of the product in URL.

RewriteEngine on
RewriteRule ^product/([a-zA-Z0-9_-]+)/([0-9]+)\.html$ product.php?id=$2

3) Redirecting non www URL to www URL

If you type yahoo.com in browser it will be redirected to www.yahoo.com. If you want to do same with your website then put the following code to .htaccess file. What is benefit of this kind of redirection?? Please check the post about SEO friendly redirect (301) redirect in php and .htaccess.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^optimaxwebsolutions\.com$
RewriteRule (.*) http://www.optimaxwebsolutions.com/$1 [R=301,L]

4) Rewriting yoursite.com/user.php?username=xyz to yoursite.com/xyz

Have you checked zorpia.com.If you type http://zorpia.com/roshanbh233 in browser you can see my profile over there. If you want to do the same kind of redirection i.e http://yoursite.com/xyz to http://yoursite.com/user.php?username=xyz then you can add the following code to the .htaccess file.

RewriteEngine On
RewriteRule ^([a-zA-Z0-9_-]+)$ user.php?username=$1
RewriteRule ^([a-zA-Z0-9_-]+)/$ user.php?username=$1

5) Redirecting the domain to a new subfolder of inside public_html.

Suppose the you’ve redeveloped your site and all the new development reside inside the “new” folder of inside root folder.Then the new development of the website can be accessed like “test.com/new”. Now moving these files to the root folder can be a hectic process so you can create the following code inside the .htaccess file and place it under the root folder of the website. In result, www.test.com point out to the files inside “new” folder.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^test\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.test\.com$
RewriteCond %{REQUEST_URI} !^/new/
RewriteRule (.*) /new/$1

So guys enjoy with .htaccess

you can use this command to find the ram size in your linux machine

free

Mem is Ram size in bytes. Use -m option for output in MB.
SWAP is the size of SWAP partition.

free -m

Looks like you’re using up a lot of memory. Top displays your memory usage a little better as far as the “easy to read” factor goes.

top

Installing mod_limitipconn.c

This is the distribution page for the Apache module mod_limitipconn.c, which
allows web server administrators to limit the number of simultaneous
downloads permitted from a single IP address.

Why did I write this module? Well, I run an mp3 server which since its
inception was being constantly hosed by people who were trying to download
dozens of files at once. For months I scoured the Internet looking for a
code snippet that would solve this problem. The closest thing I found was this
patch against an old version of Apache, and it didn’t run properly on my Linux box
(that was back then; nowadays, the patch doesn’t even apply cleanly to the
Apache source tree).

Finally I gave up and decided to write something to do the job myself, and
here’s the result.
=================
Log into ssh

(Apache 1.3.x) -
cd /usr/src
http://dominia.org/djao/limit/mod_limitipconn-0.04.tar.gz
tar xzvf mod_limitipconn-0.04.tar.gz
cd mod_limitipconn-0.04

(Apache 2.0.x)
cd /usr/src
http://dominia.org/djao/limit/mod_limitipconn-0.22.tar.gz
tar xzvf mod_limitipconn-0.22.tar.gz
cd mod_limitipconn-0.22

pico Makefile
find the line that reads APXS=apxs
change that to
APXS=/usr/local/apache/bin/apxs

press cntrl O to save
then cntrl X

// if your locations to apxs is different
locate apxs and copy the path
then paste that in
//

make
make install

service httpd restart

pico -w /etc/httpd/conf/httpd.conf

locate ExtendedStatus
Make sure ExtendedStatus is on and without the comment at the start

and add this line to every virtual directory you want to limit
or add it once to the main directory to limit all

MaxConnPerIP 3
# exempting images from the connection limit is often a good
# idea if your web page has lots of inline images, since these
# pages often generate a flurry of concurrent image requests
NoIPLimit image/*

MaxConnPerIP 1
# In this case, all MIME types other than audio/mpeg and video*
# are exempt from the limit check
OnlyIPLimit audio/mpeg video

press cntrl O to save
then cntrl X
then service

httpd restart
When i try it i have limit /download location and works really good. so dude enjoy

Hi this is a script to show your ip address

<?php
$ip = getenv(“REMOTE_ADDR”) ;
Echo “Your IP is ” . $ip;
?>

and save it with any name like file.php

Log into your mysql

$ mysql -u root –p

Output:

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 16 to server version: 4.1.15-Debian_1-log
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.

mysql>

Now setup cache size 32Mb:
mysql> SET GLOBAL query_cache_size = 33554432;    

Query OK, 0 rows affected (0.00 sec)

mysql> SHOW VARIABLES LIKE 'query_cache_size';

Output:

+——————+———-+

| Variable_name | Value |

+——————+———-+

| query_cache_size | 16777216 |

+——————+———-+

You can setup them in /etc/my.cnf (Red Hat) or /etc/mysql/my.cnf (Debian) file:
# vi /etc/my.cnf
Append config directives as follows:

query_cache_size = 33554432
query_cache_type=1
query_cache_limit=2096576