sudo grep "precise partner" /etc/apt -rnH
[sudo] password for nissen:
/etc/apt/sources.list:50:deb http://archive.canonical.com/ubuntu precise partner
/etc/apt/sources.list:51:deb-src http://archive.canonical.com/ubuntu precise partner
/etc/apt/sources.list.d/precise-partner.list.distUpgrade:1:deb http://archive.canonical.com/ubuntu precise partner #Added by software-center
/etc/apt/sources.list.d/precise-partner.list.save:1:deb http://archive.canonical.com/ubuntu precise partner #Added by software-center
/etc/apt/sources.list.d/precise-partner.list:1:deb http://archive.canonical.com/ubuntu precise partner #Added by software-center
/etc/apt/sources.list.distUpgrade:50:deb http://archive.canonical.com/ubuntu precise partner
/etc/apt/sources.list.distUpgrade:51:deb-src http://archive.canonical.com/ubuntu precise partner
/etc/apt/sources.list.save:50:deb http://archive.canonical.com/ubuntu precise partner
/etc/apt/sources.list.save:51:deb-src http://archive.canonical.com/ubuntu precise partner