Não sou especialista em servidores e estou tendo alguns problemas de atualização com o Ubuntu. Um pouco de história: meu droplet Digital Ocean estava rodando o Ubuntu 12.04 LTS, então alguns meses atrás eu atualizei para um HWE mais novo para continuar recebendo atualizações de segurança para o 12.04. Recentemente eu atualizei o Ubuntu para o 14.04 LTS. Tudo parece estar funcionando bem, exceto que não estou recebendo notificações de que há pacotes a serem atualizados. Ao fazer login no meu servidor, a Mensagem do Dia continua a exibir:
0 packages can be updated.
0 updates are security updates.
que só não pode estar certo por 3 semanas agora ...?
executando sudo apt-get update é executado sem erro e sudo apt-get upgrade diz 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Tenho a sensação de que meu /etc/apt/sources.list foi corrompido de alguma forma após a atualização para o novo kernal do HWE e, em seguida, para o novo LTS. Abaixo estão as fontes listadas atualmente. Alguém vê algum problema com essa lista? qualquer conselho seria apreciado.
$ cat /etc/apt/sources.list
#
# deb cdrom:[Ubuntu-Server 12.04.3 LTS _Precise Pangolin_ - Release i386 (20130820.2)]/ precise main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
## DigitalOcean mirrors for blazing speed!
deb http://mirrors.digitalocean.com/ubuntu/ trusty main restricted
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty main restricted
# deb http://us.archive.ubuntu.com/ubuntu/ precise main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise main restricted
## Major bug fix updates produced after the final release of the
## distribution.
## DigitalOcean mirrors for blazing speed!
deb http://mirrors.digitalocean.com/ubuntu/ trusty-updates main restricted
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-updates main restricted
# deb http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise-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.
## DigitalOcean mirrors for blazing speed!
deb http://mirrors.digitalocean.com/ubuntu/ trusty universe
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty universe
deb http://mirrors.digitalocean.com/ubuntu/ trusty-updates universe
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-updates universe
# deb http://us.archive.ubuntu.com/ubuntu/ precise universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe
# deb http://us.archive.ubuntu.com/ubuntu/ precise-updates universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise-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.
## DigitalOcean mirrors for blazing speed!
deb http://mirrors.digitalocean.com/ubuntu/ trusty multiverse
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty multiverse
deb http://mirrors.digitalocean.com/ubuntu/ trusty-updates multiverse
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-updates multiverse
# deb http://us.archive.ubuntu.com/ubuntu/ precise multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise multiverse
# deb http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise-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.
## DigitalOcean mirrors for blazing speed!
deb http://mirrors.digitalocean.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-backports main restricted universe multiverse
# deb http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
## DigitalOcean mirrors for blazing speed!
deb http://mirrors.digitalocean.com/ubuntu/ trusty-security main restricted
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-security main restricted
deb http://mirrors.digitalocean.com/ubuntu/ trusty-security universe
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-security universe
deb http://mirrors.digitalocean.com/ubuntu/ trusty-security multiverse
deb-src http://mirrors.digitalocean.com/ubuntu/ trusty-security multiverse
# deb http://security.ubuntu.com/ubuntu precise-security main restricted
# deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
# deb http://security.ubuntu.com/ubuntu precise-security universe
# deb-src http://security.ubuntu.com/ubuntu precise-security universe
# deb http://security.ubuntu.com/ubuntu precise-security multiverse
# deb-src http://security.ubuntu.com/ubuntu precise-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 precise partner
# deb-src http://archive.canonical.com/ubuntu precise partner
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## 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 precise main
# deb-src http://extras.ubuntu.com/ubuntu precise main
As versões do Ubuntu LTS não recebem muitas atualizações. Na verdade, as únicas atualizações que você vê em uma versão LTS são
Veja link para quando exatamente uma versão LTS recebe atualizações.