How to add launchpad ubuntu repository and install php5-memcached 2.2.0

Add repository

# add-apt-repository ppa:ondrej/php5

Check available versions

# apt-get update

# apt-cache policy php5-memcached

Install memcashed
# apt-get install php5-memcached

VARNISH WEB INTERFACE FOR ADMIN AND CACHE INVALIDATION

1) Download and extract

wget https://github.com/varnish/vagent2/archive/master.zip
unzip master.zip
2)Install

cd vagent2-master/
./configure
make
make install
3)Protect the interface

nano /etc/varnish/agent_secret
Insert formatted

user:password
4)Start the agent

/usr/local/bin/varnish-agent
5)Varnish Web Interfase access (when promted for login , enter the user:password from /etc/varnish/agent_secret)

http://THE-SERVER-IP:6085/html/

6) The Varnish Web Interfase allow:
stop/start varnish
Cache invalidation
Set Parameters
View varnish performance