Собственно вот они:
deb http://ftp.mgts.by/pub/ubuntu/ karmic main restricted universe multiverse
deb http://ftp.mgts.by/pub/ubuntu/ karmic-security main restricted universe multiverse
deb http://ftp.mgts.by/pub/ubuntu/ karmic-updates main restricted universe multiverse
deb http://ftp.mgts.by/pub/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://mirror.datacenter.by/pub/ubuntu/ karmic main restricted universe multiverse
deb http://mirror.datacenter.by/pub/ubuntu/ karmic-security main restricted universe multiverse
deb http://mirror.datacenter.by/pub/ubuntu/ karmic-updates main restricted universe multiverse
deb http://mirror.datacenter.by/pub/ubuntu/ karmic-proposed main restricted universe multiverse
Вписываем в /etc/apt/sources.list и наслаждаемся жизнью )