installing apc on ubuntu

$apt-get install php5-dev
$wget http://pecl.php.net/get/APC-3.1.2.tgz
$tar -zxvf APC-3.1.2.tgz
$cd APC-3.1.2

$phpize
$./configure
$make
$sudo make install

cp apc.php /var/www

sudo vi /etc/php5/apache2/php.ini
add these lines
extension=apc.so

[apc]
apc.shm_size = 100
apc.cache_by_default = 1
apc.stat = 1

and restart the apache server

and load
http://localhost/apc.php

default username and password are apc and password
you can change them in /var/www/apc.php

sudo /etc/init.d/apache2 restart

adding APC cache configuration to cakephp1.2

First install apc module in php by following this tutorial

vi app/config/core.php

and delete the last line

Cache::config('default', array('engine' => 'File'));

and replace it with

Cache::config('default', array(
'engine' => 'Apc' ,//[required]
'duration'=> 3600, //[optional]
'probability'=> 100, //[optional]
'prefix' => Inflector::slug(APP_DIR) . '_', //[optional] prefix every cache file with this string
));