Você verificou o arquivo /etc/apt/sources.list? Talvez você tenha que corrigir a lista de fontes.
Então, meu Ubuntu 14.10 que eu instalei em um laptop recentemente começou a se comportar de maneira estranha.
Ele não consegue encontrar novas atualizações enquanto eu vejo que o meu desktop Ubuntu 14.10 recebe novas atualizações duas vezes por semana no mínimo.
Posso corrigir o problema alterando o servidor do qual quero fazer o download do meu atualizado, mas isso só funciona para uma atualização. Depois disso, tenho que fazer isso novamente para ver novas atualizações.
O que poderia ter dado errado aqui que tal comportamento existe na minha máquina?
Minha sources.list:
cat /etc/apt/sources.list
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic main restricted
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates main restricted
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic universe
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic universe
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates universe
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic multiverse
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-backports main restricted universe multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-backports main restricted universe multiverse
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security main restricted
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security main restricted
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security universe
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security universe
deb http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security multiverse
deb-src http://www.nic.funet.fi/pub/mirrors/archive.ubuntu.com/ utopic-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu saucy partner
# deb-src http://archive.canonical.com/ubuntu saucy partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu utopic main
deb-src http://extras.ubuntu.com/ubuntu utopic main
Você verificou o arquivo /etc/apt/sources.list? Talvez você tenha que corrigir a lista de fontes.