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apt-get update fails with this message

Failed to fetch gzip:/var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_quantal_universe_binary-i386_Packages
Hash Sum mismatch
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marked as duplicate by Luis Alvarado Jul 24 '13 at 0:11

This question was marked as an exact duplicate of an existing question.

Open a terminal and execute the commands of the following link(copy-paste one by one). Package Manager Troubleshooting Procedure- Ubuntu Community Wiki – NikTh Apr 28 '13 at 4:51

try checking for updates, it looks like a download error
sudo apt-get update
If it is still a issue run sudo apt-get clean then try it

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sudo apt-get -f install

sudo apt-get update

to fix it.

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