apt-get não consegue encontrar o openssh-server

Question

Acabei de receber um dell com o Ubuntu 14.04 pré-carregado, mas não consigo fazer o ssh e não consigo instalar o openssh-server . Eu acho que apt-get está mal configurado, mas eu não tenho nenhuma experiência ajustando isso. Talvez repositórios errados? Alguma pista para mim?

# lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

# apt-get install rcs openssh-server

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package openssh-server is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Unable to locate package rcs
E: Package 'openssh-server' has no installation candidate

# cat /etc/apt/sources.list.d/*

deb http://dell.archive.canonical.com/updates/ trusty-dell public
deb-src http://dell.archive.canonical.com/updates/ trusty-dell public
deb http://dell.archive.canonical.com/updates/ trusty-dell-ws-vivid-skl public
deb-src http://dell.archive.canonical.com/updates/ trusty-dell-ws-vivid-skl public
deb http://oem.archive.canonical.com/updates/ trusty-oem public
deb-src http://oem.archive.canonical.com/updates/ trusty-oem public
deb http://oem.archive.canonical.com/updates/ trusty-oem-sp1 public
deb-src http://oem.archive.canonical.com/updates/ trusty-oem-sp1 public

cat /etc/apt/sources.list

ls /etc/apt/sources.list.d

fidedigno-dell.list fidedigno-dell-ws-vívido-skl.list fidedigno-oem.list fidedigno-oem-sp1.list

    

Answer 1

use o painel de gui "software & updates". Na aba "software do Ubuntu", verifique tudo, exceto "código-fonte". Na guia "Atualizações", marque "atualizações de segurança importantes" e "atualizações recomendadas". Feche o painel, salvando as alterações. Então tente novamente o apt-get e ele funciona.