A few days ago, no problem. What happened? I don’t remember ever seeing an opensuse.org domain before.
$ sudo apt-get update; sudo apt-get update
Hit:1 http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit:2 http://ppa.launchpad.net/ondrej/php/ubuntu xenial InRelease
Hit:3 http://sfo1.mirrors.digitalocean.com/mariadb/repo/10.1/ubuntu xenial InRelease
Hit:5 http://iad-2.clouds.archive.ubuntu.com/ubuntu xenial InRelease
Hit:6 http://iad-2.clouds.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:7 http://iad-2.clouds.archive.ubuntu.com/ubuntu xenial-backports InRelease
Ign:4 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 InRelease
Ign:8 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Release
Ign:9 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages.diff/Index
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Err:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Connection failed
Reading package lists... Done
W: The repository 'http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04/Packages Connection failed
E: Some index files failed to download. They have been ignored, or old ones used instead.
Hit:1 http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit:2 http://ppa.launchpad.net/ondrej/php/ubuntu xenial InRelease
Hit:4 http://sfo1.mirrors.digitalocean.com/mariadb/repo/10.1/ubuntu xenial InRelease
Hit:5 http://iad-2.clouds.archive.ubuntu.com/ubuntu xenial InRelease
Hit:6 http://iad-2.clouds.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:7 http://iad-2.clouds.archive.ubuntu.com/ubuntu xenial-backports InRelease
Ign:3 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 InRelease
Ign:8 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Release
Ign:9 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages.diff/Index
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Ign:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Ign:10 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en_US
Ign:11 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Translation-en
Err:12 http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Packages
Connection failed
Reading package lists... Done
W: The repository 'http://download.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04 Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://provo-mirror.opensuse.org/repositories/home:/rtCamp:/EasyEngine/xUbuntu_16.04/Packages Connection failed
E: Some index files failed to download. They have been ignored, or old ones used instead.