I trying update security ...
sudo apt-get update
And faiel...
Reading package lists ... Done
W: Duplicate sources.list http://archive.canonical.com/ubuntu/ precise entry / i386 partner Packages
(/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
How fix?