Não consigo instalar o Ruby no Ubuntu 16.04 LTS

Question

Não é possível instalar o Ruby via

sudo apt-get install ruby-full

Os seguintes pacotes têm dependências não atendidas: Ruby, ruby-dev, libtcltk-ruby, ri

E: Incapaz de corrigir problemas, você realizou pacotes quebrados.

## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://am.archive.ubuntu.com/ubuntu/ xenial universe
# deb-src http://am.archive.ubuntu.com/ubuntu/ xenial universe
deb http://am.archive.ubuntu.com/ubuntu/ xenial-updates universe
# deb-src http://am.archive.ubuntu.com/ubuntu/ xenial-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://am.archive.ubuntu.com/ubuntu/ xenial multiverse
# deb-src http://am.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://am.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
# deb-src http://am.archive.ubuntu.com/ubuntu/ xenial-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://am.archive.ubuntu.com/ubuntu/ xenial-backports restricted universe multiverse
# deb-src http://am.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe 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 xenial partner
# deb-src http://archive.canonical.com/ubuntu xenial partner

deb http://security.ubuntu.com/ubuntu xenial-security restricted
# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu xenial-security universe
# deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu xenial-security multiverse
# deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
~          

    

Answer 1

Parece que você está perdendo as primeiras linhas do seu arquivo /etc/apt/sources.list. Coloque-os manualmente no início do seu arquivo:

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/main/binary-i386/

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ precise main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://am.archive.ubuntu.com/ubuntu/ xenial main restricted
deb-src http://am.archive.ubuntu.com/ubuntu/ xenial main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://am.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb-src http://am.archive.ubuntu.com/ubuntu/ xenial-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://am.archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://am.archive.ubuntu.com/ubuntu/ xenial universe
deb http://am.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://am.archive.ubuntu.com/ubuntu/ xenial-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 

Eu sei que isso parece um pouco engraçado, mas eu diria que é isso que está faltando no seu arquivo. Copie e cole-os na parte superior de /etc/apt/sources.list e execute sudo apt-get update e, em seguida, tente instalar.