The Unity search function in Ubuntu operating system is provided by Canonical Ltd. When you enter a search term into the dash, Ubuntu will search your computer and will record the search terms locally. Unless you have opted out, the search terms will be sent to productsearch.ubuntu.com link and selected third parties including Facebook, Twitter, BBC, and Amazon. Canonical and these selected third parties will collect your search terms and use them to provide you with search results while using Ubuntu.
This is an edited version of a post that originally appeared on a blog called The Michigan Telephone Blog, which was written by a friend before he decided to stop blogging. It is reposted with his permission. Comments dated before the year 2013 were originally posted to his blog.
If you hate the Unity interface in the latest version of Ubuntu, try this. From a terminal prompt, enter:
sudo apt-get install gnome-session-fallback
I’d assume that you could also install gnome-session-fallback from Synaptic if you prefer. Then, choose “GNOME Classic” at signon.