Unable to install openjdk7 from terminal

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http://askubuntu.com – When i tried to install jdk from following command: sudo apt-get install openjdk-7-jdk Following error was displayed: Err http://us.archive.ubuntu.com/ubuntu/ precise-updates/universe openjdk-7-jre-lib all 7u7-2.3.2-1ubuntu0.12.04.1 404 Not Found [IP: 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? (HowTos)