Activating Bengali / Bangla on LibreOffice on Ubuntu 16.04 LTS

1. Using synaptic package manager install the language-pack-bn-base and language-pack-bn
2. restart the computer.
3. In Libre Office Writer, goto Tools -> Options->
4. Under Language settings click Languages -> 
5. activate Complex text layout (CTL)
6. Select Bengali (Bangladesh)
7. Click OK
8. Now Close all the LibreOffice windows. and open to write Bangla!