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http://maketecheasier.com/10-must-have-indicator-applets-for-ubuntu-12-04/2012/06/15
sudo apt-get update
W: Failed to fetch http://ppa.launchpad.net/fredp/ppa/ubuntu/dists/precise/main/source/Sources 404 Not FoundW: Failed to fetch http://ppa.launchpad.net/fredp/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not FoundW: Failed to fetch http://ppa.launchpad.net/hel-sheep/pastie/ubuntu/dists/precise/main/source/Sources 404 Not FoundW: Failed to fetch http://ppa.launchpad.net/hel-sheep/pastie/ubuntu/dists/precise/main/binary-i386/Packages 404 Not FoundW: Failed to fetch http://ppa.launchpad.net/lookit/ppa/ubuntu/dists/precise/main/source/Sources 404 Not FoundW: Failed to fetch http://ppa.launchpad.net/lookit/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not FoundE: Some index files failed to download. They have been ignored, or old ones used instead.
sudo ls /etc/apt/sources.list.d
sudo rm /etc/apt/sources.list.d/The_PPA_Name.list
sudo add-apt-repository --remove ppa:The_PPA_Name/ppa
http://maketecheasier.com/fix-the-package-information-was-last-updated-days-ago-error-in-ubuntu/2012/06/22