Failed to load the package list

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http://askubuntu.com – First of all say apology to Ask Duplicate Question. I'm Using First time Ubuntu 12.10 OS.when i'm update the Update Manager it is giving error like this .... Failed to load the package list: This is a serious problem. Try again later. If this problem appears again, please report an error to the developers. E: Malformed line 60 in source list /etc/apt/sources.list (dist parse) E: The list of sources could not be read. I'm Search solution for this error some body say type following commands... sudo rm /var/lib/apt/lists/* -vf sudo apt-get update But again it is showing following error. (HowTos)