$ -get update [sudo] password for kim: Ign:1 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty InRelease Hit:2 http://ppa.launchpad.net/dismine/valentina/ubuntu yakkety InRelease Hit:3 http://ppa.launchpad.net/flexiondotorg/youtube-dl-gui/ubuntu zesty InRelease Hit:4 http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu zesty InRelease Hit:5 http://ppa.launchpad.net/thomas-schiex/blender/ubuntu zesty InRelease Hit:6 http://ppa.launchpad.net/wine/wine-builds/ubuntu zesty InRelease Ign:7 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty Release Ign:8 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main amd64 Packages Ign:9 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main i386 Packages Ign:10

….(additional ignore warnings about valentina snipped)

Get:15 http://mirrors.wikimedia.org/ubuntu zesty-updates InRelease [89.2 kB] Hit:16 http://archive.canonical.com/ubuntu zesty InRelease

Ign:17 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main all DEP-11 Metadata Ign:18 http://download.videolan.org/pub/debian/stable InRelease Ign:19 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main DEP-11 64x64 Icons Get:20 http://mirrors.wikimedia.org/ubuntu zesty-security InRelease [89.2 kB] Ign:21 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main DEP-11 128x128 Icons Hit:22 http://download.videolan.org/pub/debian/stable Release

Get:23 http://mirrors.wikimedia.org/ubuntu zesty-updates/main i386 Packages [44.9 kB]

…. (additional unrelated successful “get” snipped)

Ign:8 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main amd64 Packages Get:29 http://mirrors.wikimedia.org/ubuntu zesty-security/main amd64 DEP-11 Metadata [204 B] Get:30 http://mirrors.wikimedia.org/ubuntu zesty-security/universe amd64 DEP-11 Metadata [2,184 B] Ign:9 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main i386 Packages Ign:10 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main all Packages

…. (additional ignore warnings related to valentina snipped)

Ign:21 http://ppa.launchpad.net/dismine/valentina/ubuntu zesty/main DEP-11 128x128 Icons Fetched 353 kB in 19s (18.1 kB/s) Reading package lists... Done W: The repository 'http://ppa.launchpad.net/dismine/valentina/ubuntu zesty 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://ppa.launchpad.net/dismine/valentina/ubuntu/dists/zesty/main/bi nary-amd64/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. $