Estou tentando instalar o Krita no Linux Ubuntu 16.4
seguindo isto:
sudo add-apt-repository ppa:kubuntu-ppa/backports
sudo apt-get update
sudo apt-get install krita
Estou recebendo isso quando tento o segundo comando (para atualização):
Err:1 http://rs.archive.ubuntu.com/ubuntu xenial InRelease
Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:2 http://rs.archive.ubuntu.com/ubuntu xenial-backports InRelease
Unable to connect to 172.16.0.3:8080:
Err:3 http://rs.archive.ubuntu.com/ubuntu xenial-updates InRelease
Unable to connect to 172.16.0.3:8080:
Err:4 http://archive.canonical.com/ubuntu xenial InRelease
Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:5 http://dl.google.com/linux/chrome/deb stable InRelease
Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:6 http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu xenial InRelease
Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:7 http://security.ubuntu.com/ubuntu xenial-security InRelease
Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Reading package lists... Done
W: Failed to fetch http://rs.archive.ubuntu.com/ubuntu/dists/xenial/InRelease Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to fetch http://rs.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease Unable to connect to 172.16.0.3:8080:
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to http://archive.canonical.com/ubuntu/dists/xenial/InRelease Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to fetch http://rs.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease Unable to connect to 172.16.0.3:8080:
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to fetch http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu/dists/xenial/InRelease Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Some index files failed to download. They have been ignored, or old ones used instead.
-Não estou usando o proxy
-O primeiro comando também não funciona:
gpg: keyserver receive failed: keyserver error
-O terceiro comando também, mas eu não vou digitar nada sobre o terceiro, porque eu acho que o principal problema é:
Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
-Eu tentei isso (então eu acho que um firewall não é problema):
sudo ufw disable
O que devo fazer para poder atualizar o sistema operacional e instalar o Krita (ou qualquer outro aplicativo)?