enable mod userdir under apache2

Apache2 mod userdir give each user in Ubuntu system have access their home folder under public_html. All web files, web system, etc must be put under this public_html. User or anybody can access that files/web system in any web browser using http://localhost/~username (locally) or http://ip-address/~username (in the network/intranet). Below is the command to enable the userdir mod.

1. sudo a2enmod userdir
2. service apache2 restart

To enable php you need to comment out ifModule userdir in php5.conf