Sinhala Unicode typing with i-bus in Ubuntu 14.04

Ubuntu repositories are little bit changed and you have to alter the command instructed to execute in www.siyabas.lk to as following,
In terminal run,

sudo apt-get install fonts-lklug-sinhala ibus im-switch ibus-m17n m17n-db m17n-contrib

no need to run

rm -f ~/.xinput.d/* ; im-switch -z all_ALL -s ibus

as seen in http://www.siyabas.lk/sinhala_how_to_install.html#lin

then run

ibus-setup

In ibus-setup select "Sinhala; Sinahalese-wijesekara (m17n)" as input method and add it.

Then run ibus-daemon is it's not already started.

ibus-daemon

Then click on En button on status bar  and then to Text Entry Settings

To add Sinhala; Sinahalese (Wijesekara (m17n)) click on + button below the list and search for "Sinhala"

You can add shortcut to change over from one to another language. And that's all.