1. aptitude mysql-server mysql-client
At this time, you will be asked for mysql root user's password
2. aptitude apache2
3. aptitude php5 libapache2-mod-php5
4. /etc/init.d/apache2 restart - to finish installation
Note : You may get this error
"apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName"
This is because of doing unable to define host name
Sol : "nano /etc/hosts"
127.0.0.1 localhost.local localhost
127.0.1.1
Then, save it and restart apache