Installing ibus-avro on Ubuntu 14.04

Open Terminal and enter the following commands one by one.

Step 1: Add ibus-avro repository

sudo add-apt-repository "deb http://download.opensuse.org/repositories/home:/sarimkhan/xUbuntu_14.04/ ./"

Step 2: Add key

wget -q http://download.opensuse.org/repositories/home:/sarimkhan/xUbuntu_14.04/Release.key -O- | sudo apt-key add -

Step 3: Update package list

sudo apt-get update

Step 4: Install ibus-avro

sudo apt-get install ibus-avro-trusty

Step 5: Now you need to logout and login again or restart your computer.

Click the IM icon in menubar and Select Text Entry Setting
In Text Entry Setting window click + icon (marked by arrow) in left pane. Write avro in the search box (marked by arrow). Choose Bengali (Avro Phonetic) from the list and press Add button to add Avro to the list.
(Optional) The keyboard shortcut to switch input method has been changed to Super+Space since ubuntu 13.10. You can change it to your preference from Text Entry Setting window.
Open any text editing software (like, gedit). Now Press Super+Space to toggle between English and Avro (Bengali)
Enjoy Avro Phonetic!

Step 1: Open Text Entry Setting and remove Avro Phonetic by clicking - icon.

Step 2: Open Terminal and enter the following command:

sudo apt-get remove ibus-avro-trusty