O sistema diz que há um repositório não assinado " link artístico".
Tente este comando:
sudo apt-key adv --keyserver chaveserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
Deve resolver o seu problema.
Depois de executar o comando sudo apt-get update no meu terminal, eu tenho alguns erros:
Hit:1 https://dl.yarnpkg.com/debian stable InRelease
Hit:2 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu artful InRelease
Get:3 http://id.archive.ubuntu.com/ubuntu artful InRelease [237 kB]
Get:4 http://security.ubuntu.com/ubuntu artful-security InRelease [78,6 kB]
Err:3 http://id.archive.ubuntu.com/ubuntu artful InRelease
The following signatures were invalid: BADSIG 3B4FE6ACC0B21F32 Ubuntu Archive Automatic Signing Key (2012) <[email protected]>
Hit:5 http://id.archive.ubuntu.com/ubuntu artful-updates InRelease
Get:6 http://id.archive.ubuntu.com/ubuntu artful-backports InRelease [72,2 kB]
Reading package lists... Done
W: GPG error: http://id.archive.ubuntu.com/ubuntu artful InRelease: The following signatures were invalid: BADSIG 3B4FE6ACC0B21F32 Ubuntu Archive Automatic Signing Key (2012) <[email protected]>
E: The repository 'http://id.archive.ubuntu.com/ubuntu artful InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Se eu ignorar e tentar
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev nodejs yarn
Eu recebo mais erros e os pacotes não são instalados
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package sqlite3 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
Package zlib1g-dev 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
Package build-essential 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
Package nodejs 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
Package python-software-properties 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
However the following packages replace it:
software-properties-common
E: Unable to locate package git-core
E: Package 'zlib1g-dev' has no installation candidate
E: Package 'build-essential' has no installation candidate
E: Unable to locate package libreadline-dev
E: Unable to locate package libyaml-dev
E: Unable to locate package libsqlite3-dev
E: Package 'sqlite3' has no installation candidate
E: Unable to locate package libxslt1-dev
E: Package 'python-software-properties' has no installation candidate
E: Unable to locate package libffi-dev
E: Package 'nodejs' has no installation candidate