How To Install Unikey on Ubuntu 12.04

1) Open Termial and Install Ibus-unikey sudo apt-get install ibus-unikey

2) Open System Setting> Language Support > Keyboard input method: Ibus

3) Reboot system  sudo reboot 4)  On top of right click icon Keyboard  >  Preference >  Input Method >  Customize Active Method input > Vietnamese: Unikey > add > close