Ако си със стандартен Ubuntu Desktop, изпълняваш :
sudo gedit /etc/apt/sources.list
Ако ти се отвори списъка с хранилища, изтриваш всичко в него и копираш този :
###### Ubuntu Main Repos
deb
http://bg.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse
deb-src
http://bg.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse
###### Ubuntu Update Repos
deb
http://bg.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb
http://bg.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb
http://bg.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src
http://bg.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src
http://bg.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src
http://bg.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
###### Ubuntu Partner Repo
deb
http://archive.canonical.com/ubuntu trusty partner
deb-src
http://archive.canonical.com/ubuntu trusty partner
Запазваш промените, затваряш файла и отново изпълняваш :
sudo apt-get update