Install Ubuntu 12.04 Server LTS 32 or 64-bit

Commercial Modules

Commercial modules and add-ons are not currently supported on the Ubuntu platform. Commercial Modules can be purchased in the FreePBX Distro Market Place and are only supported on the FreePBX Distro platform.

Initial System Setup

Configure your root password.

Switch to the Root User

Update Your System

Install Required Dependencies

Install PearDB

You may receive a warning:

At this time it is safe to ignore that message

Reboot server

Install Dependencies for Google Voice

Install iksemel

Install and Configure Asterisk

Download Asterisk source files.

Compile and install DAHDI.

Compile and install LIBPRI.

Compile and install Asterisk

Install Asterisk-Extra-Sounds

Install and Configure FreePBX

Download and extract FreePBX.

Now create the Asterisk user and set ownership permissions.

A few small modifications to Apache.

Configure Asterisk database in MYSQL. 

Set permissions on MYSQL database.

Restart Asterisk and install FreePBX.

** If “. /install_amp” fails to run correctly, in terminal type:

Finally, one last mod and start FreePBX.

Start FreePBX

Navigate: 

http://yourlocalipaddress/html or if you prefer http://localhost/admin

After you enable and update the modules in FreePBX You might see the following error.
Symlink from modules failed 
 

To correct this error do the following: 

Delete the list of failed files

Then on the FreePBX webUI go to the ‘Module Admin’ and uninstall and reinstall the ‘Camp On’ module. This should resolve the Symlink issue.