Graphical Installation
You need to install the client software, which will act as a daemon and boinc client will be automatically started at boot time.
Command to install boinc-client
sudo apt-get install boinc-client
You need the boinc manager to have a graphical interface to monitor and control boinc client.
Command to install boinc-manager
sudo apt-get install boinc-manager
Both the above commands can be combined and run together as
sudo apt-get install boinc-client boinc-manager
To open Boinc Manager. Use dash(Super Key) and search for "boinc"
Non-Graphical Installation
If you are not looking for a graphical interface you just need to install boinc-client
sudo apt-get install boinc-client
Via Ubuntu Software Center
You can also use Ubuntu Software Center to install Boinc. Search for "boinc-client" in Ubuntu Software Center.

The other problem is I can't it to become a startupapplication.
– Pablo Viollier Nov 30 '12 at 14:05apt-cache policy bonic-manager– devav2 Nov 30 '12 at 14:15