Memcached is free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
First of all, install memcached dan php5-memcached packages:
$ sudo apt-get install memcached php5-memcached
and then make sure memcached is running with this command:
$ netstat -anp | grep 11211 tcp 0 0 127.0.0.1:11211 0.0.0.0:* LISTEN 20518/memcached udp 0 0 127.0.0.1:11211 0.0.0.0:* 20518/memcached
Restart apache web server:
$ sudo /etc/init.d/apache2 restart
Check php5-memcached module using phpinfo.php:
$ nano /var/www/phpinfo.php
Write below code:
<?php phpinfo(); ?>
Open browser and go to http://ip_address_server/phpinfo.php and search for memcached line.
memcached installation on Debian / Ubuntu is finished.