How to add the options:
- Lock Screen
to the unity dash as shown in the picture below.
Thanks to atareao team.
With reference to this I found a pretty solution to share.
Install Power Commands for unity dash in Ubuntu 12.04 – 14.04
sudo add-apt-repository ppa:atareao/atareao sudo apt-get update sudo apt-get install power-commands
After installation has completed the items will be available to find in the Dash almost instantly. If you don’t see them you may need to log out and back in to force the Dash to detect them.
To uninstall at a later date you simply need to open the Ubuntu Software Centre, search for ‘Power Commands’ and hit the ‘remove’ button.