I have some problem with updates. Could anyone get this problem sorted out. I can't figure out what all repositories are failing my updates. Which one should I remove. Also, I don't want to see that red failing update method in top bar. ➜ ~ sudo apt-get update [sudo] password for user_name: Ign http://dl.google.com stable InRelease ................................................................................................. # Multiple line but no fail or Err messages so removed ................................................................................................. Hit http://security.ubuntu.com trusty-security/restricted Translation-en Hit http://security.ubuntu.com trusty-security/universe 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 freya/main Sources 404 Not Found Err http://ppa.launchpad.net freya/main amd64 Packages 404 Not Found Err http://ppa.launchpad.net freya/main i386 Packages 404 Not Found Ign http://ppa.launchpad.net freya/main Translation-en_US Ign http://ppa.launchpad.net freya/main Translation-en Err http://ppa.launchpad.net freya/main Sources 404 Not Found Err http://ppa.launchpad.net freya/main amd64 Packages 404 Not Found Err http://ppa.launchpad.net freya/main i386 Packages 404 Not Found Ign http://ppa.launchpad.net freya/main Translation-en_US Ign http://ppa.launchpad.net freya/main Translation-en Fetched 1,836 kB in 53s (34.2 kB/s) W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/Release Unable to find expected entry 'non-free/source/Sources' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/freya/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/freya/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/freya/main/binary-i386/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/freya/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/freya/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/freya/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. ➜ ~