How to optimize Apache, setup Memcached and PHP on Ubuntu ?

Install and setup Apache

// Install Apache2  

sudo apt-get install apache2

// Edit Config

vim /etc/apache2/apache2.conf

<IfModule mpm_prefork_module>

StartServers       10

MinSpareServers    10

MaxSpareServers   10

ServerLimit      256

MaxClients       256

MaxRequestsPerChild 10000

</IfModule>

// check module

apachectl -V | grep -i mpm

// disable event

a2dismod mpm_prefork

// Enable Prefork

a2enmod mpm_prefork

// Restart Apache

service apache restart

Install Memcahced

// Install memcached

sudo apt-get update

sudo apt-get install php5 php5-memcache

sudo apt-get install memcached

sudo apt-get install php-pear

sudo apt-get install build-essential

sudo pecl install memcache

// restart memcached

sudo service memcached restart 

You should add "extension=memcache.so" to php.ini  and restart Apache 

 

// Check Memcache

ps aux | grep memcache 

Install PHP

sudo apt-get install php5 php5-mysql

sudo apt-get install --purge mysql-client mysql-common 

// Remove MYSQL

sudo apt-get remove --purge mysql-server mysql-client mysql-common

sudo apt-get autoremove

sudo apt-get autoclean

Solutions to common problems

Problem1:  

The mcrypt extension is missing. Please check your PHP configuration.

Solution:

sudo apt-get install php5-mcrypt

sudo apt-get install mcrypt

Problem2:  

Need CURL PHP extension to connect facebook

Solution:

sudo apt-get install curl libcurl3 libcurl3-dev php5-curl

Problem3:

Echo PHP Not Support at HTML

Solution:

vim /etc/php5/apache2/php.ini

short_open_tag = On  

service apache2 stop

service apache2 start

   

chown -R www-data /var/www/html/
chmod -R u+w /var/www/html/