mitydsp@mitydsp-dev:/etc/apt$ sudo sed -i -re 's/([a-z]{2}\.)?archive.ubuntu.com|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list [sudo] password for mitydsp: mitydsp@mitydsp-dev:/etc/apt$ sudo apt-get update && sudo apt-get dist-upgrade Ign http://ppa.launchpad.net lucid Release.gpg Ign http://ppa.launchpad.net/u-boot-tools/ppa/ubuntu/ lucid/main Translation-en_US Hit http://old-releases.ubuntu.com lucid Release.gpg Ign http://old-releases.ubuntu.com/ubuntu/ lucid/main Translation-en_US Ign http://old-releases.ubuntu.com/ubuntu/ lucid/universe Translation-en_US Ign http://old-releases.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US Ign http://old-releases.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_US Ign http://ppa.launchpad.net lucid Release Hit http://old-releases.ubuntu.com lucid Release Ign http://ppa.launchpad.net lucid/main Packages Hit http://old-releases.ubuntu.com lucid/main Packages Ign http://ppa.launchpad.net lucid/main Packages Err http://ppa.launchpad.net lucid/main Packages 404 Not Found Hit http://old-releases.ubuntu.com lucid/universe Packages Hit http://old-releases.ubuntu.com lucid/restricted Packages Hit http://old-releases.ubuntu.com lucid/multiverse Packages Hit http://old-releases.ubuntu.com lucid/main Sources Hit http://old-releases.ubuntu.com lucid/universe Sources Hit http://old-releases.ubuntu.com lucid/restricted Sources Hit http://old-releases.ubuntu.com lucid/multiverse Sources W: Failed to fetch http://ppa.launchpad.net/u-boot-tools/ppa/ubuntu/dists/lucid/main/binary-i386/Packages.gz 404 Not Found ################3 Second log after disable the http://ppa.launchpad.net lucid link from the Update Source Manager ####################### mitydsp@mitydsp-dev:/etc/apt$ sudo apt-get update && sudo apt-get dist-upgrade Hit http://old-releases.ubuntu.com lucid Release.gpg Ign http://old-releases.ubuntu.com/ubuntu/ lucid/main Translation-en_US Ign http://old-releases.ubuntu.com/ubuntu/ lucid/universe Translation-en_US Ign http://old-releases.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US Ign http://old-releases.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_US Hit http://old-releases.ubuntu.com lucid Release Hit http://old-releases.ubuntu.com lucid/main Packages Hit http://old-releases.ubuntu.com lucid/universe Packages Hit http://old-releases.ubuntu.com lucid/restricted Packages Hit http://old-releases.ubuntu.com lucid/multiverse Packages Hit http://old-releases.ubuntu.com lucid/main Sources Hit http://old-releases.ubuntu.com lucid/universe Sources Hit http://old-releases.ubuntu.com lucid/restricted Sources Hit http://old-releases.ubuntu.com lucid/multiverse Sources Reading package lists... Done Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. mitydsp@mitydsp-dev:/etc/apt$ sudo apt-get install build-essential u-boot-toolsReading package lists... Done Building dependency tree Reading state information... Done E: Couldn't find package u-boot-tools