Here are the outputs. $ sudo apt-get update Ign http://dl.google.com stable InRelease Ign http://archive.canonical.com trusty InRelease Ign http://ppa.launchpad.net trusty InRelease Ign http://linux.dropbox.com trusty InRelease Ign http://download.opensuse.org ./ InRelease Get:1 http://download.virtualbox.org trusty InRelease [7,144 B] Ign http://download.virtualbox.org trusty InRelease Ign http://extras.ubuntu.com trusty InRelease Ign http://archive.canonical.com precise InRelease Hit http://linux.dropbox.com trusty Release.gpg Ign http://download.opensuse.org ./ Release.gpg Hit http://archive.canonical.com trusty Release.gpg Hit http://ppa.launchpad.net trusty InRelease Hit http://linux.dropbox.com trusty Release Hit http://extras.ubuntu.com trusty Release.gpg Ign http://download.opensuse.org ./ Release Hit http://archive.canonical.com precise Release.gpg Hit http://linux.dropbox.com trusty/main amd64 Packages Hit http://extras.ubuntu.com trusty Release Hit http://archive.canonical.com trusty Release Get:2 https://dl.winehq.org trusty InRelease Ign https://dl.winehq.org trusty InRelease Ign http://ppa.launchpad.net trusty InRelease Hit http://dl.google.com stable Release.gpg Hit http://linux.dropbox.com trusty/main i386 Packages Hit http://archive.canonical.com precise Release Get:3 https://dl.winehq.org xenial InRelease Ign https://dl.winehq.org xenial InRelease Hit http://extras.ubuntu.com trusty/main Sources Hit http://dl.google.com stable Release Get:4 https://dl.winehq.org trusty/main amd64 Packages/DiffIndex Ign https://dl.winehq.org trusty/main amd64 Packages/DiffIndex Hit http://archive.canonical.com trusty/partner Sources Hit http://ppa.launchpad.net trusty InRelease Hit http://extras.ubuntu.com trusty/main amd64 Packages Ign http://archive.ubuntu.com trusty InRelease Ign https://dl.winehq.org trusty/main i386 Packages/DiffIndex Hit http://archive.canonical.com trusty/partner amd64 Packages Hit http://archive.ubuntu.com trusty-updates InRelease Hit http://archive.canonical.com trusty/partner i386 Packages Hit http://extras.ubuntu.com trusty/main i386 Packages Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-security InRelease Hit https://esm.ubuntu.com trusty-infra-security InRelease Hit http://archive.canonical.com trusty/partner Translation-en Ign https://dl.winehq.org xenial/main amd64 Packages/DiffIndex Hit http://archive.ubuntu.com trusty-backports InRelease Hit http://archive.canonical.com precise/partner Sources Hit http://dl.google.com stable/main amd64 Packages Hit https://esm.ubuntu.com trusty-infra-updates InRelease Ign http://ppa.launchpad.net trusty InRelease Ign https://dl.winehq.org xenial/main i386 Packages/DiffIndex Hit http://archive.ubuntu.com trusty Release.gpg Hit http://archive.canonical.com precise/partner amd64 Packages Hit https://esm.ubuntu.com trusty-infra-security/main amd64 Packages Hit http://archive.ubuntu.com trusty-updates/main Sources Hit http://archive.canonical.com precise/partner i386 Packages Ign http://ppa.launchpad.net trusty InRelease Ign http://download.virtualbox.org trusty/contrib amd64 Packages/DiffIndex Hit http://archive.canonical.com precise/partner Translation-en Hit http://archive.ubuntu.com trusty-updates/restricted Sources Hit https://esm.ubuntu.com trusty-infra-security/main i386 Packages Hit http://download.virtualbox.org trusty/contrib amd64 Packages Hit http://ppa.launchpad.net trusty InRelease Ign http://linux.dropbox.com trusty/main Translation-en_US Get:5 https://esm.ubuntu.com trusty-infra-security/main Translation-en_US Ign http://download.virtualbox.org trusty/contrib Translation-en_US Ign http://linux.dropbox.com trusty/main Translation-en Ign http://download.virtualbox.org trusty/contrib Translation-en Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/universe Sources Hit https://esm.ubuntu.com trusty-infra-updates/main amd64 Packages Hit http://archive.ubuntu.com trusty-updates/multiverse Sources Err http://download.opensuse.org ./ Packages 404 Not Found [IP: 195.135.221.134 80] Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/main amd64 Packages Hit https://esm.ubuntu.com trusty-infra-updates/main i386 Packages Ign http://download.opensuse.org ./ Translation-en_US Hit http://archive.ubuntu.com trusty-updates/restricted amd64 Packages Get:6 https://esm.ubuntu.com trusty-infra-updates/main Translation-en_US Ign http://download.opensuse.org ./ Translation-en Hit http://ppa.launchpad.net trusty InRelease Hit https://dl.winehq.org trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty-updates/universe amd64 Packages Ign http://extras.ubuntu.com trusty/main Translation-en_US Hit https://dl.winehq.org trusty/main i386 Packages Hit http://archive.ubuntu.com trusty-updates/multiverse amd64 Packages Ign http://extras.ubuntu.com trusty/main Translation-en Get:7 https://dl.winehq.org trusty/main Translation-en_US Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/main i386 Packages Hit http://archive.ubuntu.com trusty-updates/restricted i386 Packages Hit https://dl.winehq.org xenial/main amd64 Packages Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/universe i386 Packages Hit https://dl.winehq.org xenial/main i386 Packages Hit http://archive.ubuntu.com trusty-updates/multiverse i386 Packages Get:8 https://dl.winehq.org xenial/main Translation-en_US Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/main Translation-en Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/multiverse Translation-en Hit http://archive.ubuntu.com trusty-updates/restricted Translation-en Hit http://ppa.launchpad.net trusty InRelease Hit http://archive.ubuntu.com trusty-updates/universe Translation-en Ign https://dl.winehq.org trusty/main Translation-en_US Ign https://dl.winehq.org trusty/main Translation-en Ign http://ppa.launchpad.net trusty Release.gpg Hit http://archive.ubuntu.com trusty-security/main Sources Ign https://dl.winehq.org xenial/main Translation-en_US Hit http://archive.ubuntu.com trusty-security/restricted Sources Ign https://dl.winehq.org xenial/main Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty-security/universe Sources Hit http://archive.ubuntu.com trusty-security/multiverse Sources Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty-security/main amd64 Packages Ign http://dl.google.com stable/main Translation-en_US Hit http://archive.ubuntu.com trusty-security/restricted amd64 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty-security/universe amd64 Packages Ign http://dl.google.com stable/main Translation-en Ign https://esm.ubuntu.com trusty-infra-security/main Translation-en_US Hit http://archive.ubuntu.com trusty-security/multiverse amd64 Packages Hit http://ppa.launchpad.net trusty Release.gpg Ign https://esm.ubuntu.com trusty-infra-security/main Translation-en Hit http://archive.ubuntu.com trusty-security/main i386 Packages Hit http://archive.ubuntu.com trusty-security/restricted i386 Packages Ign https://esm.ubuntu.com trusty-infra-updates/main Translation-en_US Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty-security/universe i386 Packages Ign https://esm.ubuntu.com trusty-infra-updates/main Translation-en Hit http://archive.ubuntu.com trusty-security/multiverse i386 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty-security/main Translation-en Hit http://archive.ubuntu.com trusty-security/multiverse Translation-en Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty-security/restricted Translation-en Hit http://archive.ubuntu.com trusty-security/universe Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty-backports/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty-backports/multiverse amd64 Packages Hit http://archive.ubuntu.com trusty-backports/universe amd64 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty-backports/restricted amd64 Packages Hit http://archive.ubuntu.com trusty-backports/main i386 Packages Hit http://ppa.launchpad.net trusty Release.gpg Hit http://archive.ubuntu.com trusty-backports/multiverse i386 Packages Ign http://ppa.launchpad.net trusty Release.gpg Hit http://archive.ubuntu.com trusty-backports/universe i386 Packages Hit http://archive.ubuntu.com trusty-backports/restricted i386 Packages Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty-backports/main Translation-en Hit http://archive.ubuntu.com trusty-backports/multiverse Translation-en Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty-backports/restricted Translation-en Hit http://archive.ubuntu.com trusty-backports/universe Translation-en Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty Release Hit http://archive.ubuntu.com trusty/main Sources Hit http://ppa.launchpad.net trusty/main Sources Hit http://archive.ubuntu.com trusty/restricted Sources Hit http://archive.ubuntu.com trusty/universe Sources Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty/multiverse Sources Hit http://archive.ubuntu.com trusty/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty/restricted amd64 Packages Hit http://archive.ubuntu.com trusty/universe amd64 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty/multiverse amd64 Packages Hit http://archive.ubuntu.com trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty/restricted i386 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty/universe i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty/multiverse i386 Packages Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty/main Translation-en Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://archive.ubuntu.com trusty/multiverse Translation-en Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://archive.ubuntu.com trusty/restricted Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://archive.ubuntu.com trusty/universe Translation-en Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://ppa.launchpad.net trusty/main Sources Hit http://ppa.launchpad.net trusty/main amd64 Packages Ign http://archive.ubuntu.com trusty/main Translation-en_US Ign http://archive.ubuntu.com trusty/multiverse Translation-en_US Hit http://ppa.launchpad.net trusty/main i386 Packages Ign http://archive.ubuntu.com trusty/restricted Translation-en_US Ign http://archive.ubuntu.com trusty/universe Translation-en_US Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Ign http://ppa.launchpad.net trusty Release Hit http://ppa.launchpad.net trusty Release Hit http://ppa.launchpad.net trusty Release Ign http://ppa.launchpad.net trusty Release Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Hit http://ppa.launchpad.net trusty/main amd64 Packages Hit http://ppa.launchpad.net trusty/main i386 Packages Hit http://ppa.launchpad.net trusty/main Translation-en Ign http://ppa.launchpad.net trusty/main amd64 Packages/DiffIndex Ign http://ppa.launchpad.net trusty/main i386 Packages/DiffIndex Err http://ppa.launchpad.net trusty/main Sources 404 Not Found [IP: 91.189.95.83 80] Err http://ppa.launchpad.net trusty/main amd64 Packages 404 Not Found [IP: 91.189.95.83 80] Err http://ppa.launchpad.net trusty/main i386 Packages 404 Not Found [IP: 91.189.95.83 80] Ign http://ppa.launchpad.net trusty/main Translation-en_US Ign http://ppa.launchpad.net trusty/main Translation-en Ign http://ppa.launchpad.net trusty/main Translation-en_US Ign http://ppa.launchpad.net trusty/main Translation-en Err http://ppa.launchpad.net trusty/main amd64 Packages 403 Forbidden [IP: 91.189.95.83 80] Err http://ppa.launchpad.net trusty/main i386 Packages 403 Forbidden [IP: 91.189.95.83 80] Fetched 19.7 kB in 35s (546 B/s) W: GPG error: http://download.virtualbox.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 54422A4B98AB5139 W: GPG error: https://dl.winehq.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F W: GPG error: https://dl.winehq.org xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F W: Failed to fetch http://download.opensuse.org/repositories/home:/sarimkhan/xUbuntu_14.04/./Packages 404 Not Found [IP: 195.135.221.134 80] W: Failed to fetch http://ppa.launchpad.net/alexeftimie/ppa/ubuntu/dists/trusty/main/source/Sources 404 Not Found [IP: 91.189.95.83 80] W: Failed to fetch http://ppa.launchpad.net/alexeftimie/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found [IP: 91.189.95.83 80] W: Failed to fetch http://ppa.launchpad.net/alexeftimie/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found [IP: 91.189.95.83 80] W: Failed to fetch http://ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu/dists/trusty/main/binary-amd64/Packages 403 Forbidden [IP: 91.189.95.83 80] W: Failed to fetch http://ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu/dists/trusty/main/binary-i386/Packages 403 Forbidden [IP: 91.189.95.83 80] E: Some index files failed to download. They have been ignored, or old ones used instead. #---------------------------- #---------------------------- #---------------------------- $ apt-cache policy | grep esm 500 https://esm.ubuntu.com/ubuntu/ trusty-infra-updates/main i386 Packages origin esm.ubuntu.com 500 https://esm.ubuntu.com/ubuntu/ trusty-infra-updates/main amd64 Packages origin esm.ubuntu.com 500 https://esm.ubuntu.com/ubuntu/ trusty-infra-security/main i386 Packages origin esm.ubuntu.com 500 https://esm.ubuntu.com/ubuntu/ trusty-infra-security/main amd64 Packages origin esm.ubuntu.com W: Ignoring Provides line with DepCompareOp for package gdb-minimal W: Ignoring Provides line with DepCompareOp for package gdb-minimal W: You may want to run apt-get update to correct these problems