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I am using ubuntu 12.04LTS. From past few days i am not able to update and downlaod anything. The ubuntu software center crash everytime I open it. Synaptic also got the same problem and the terminal show some sort of repository error while downloading and updating ubuntu.

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1 Answer 1

Most likely a problem with the repositories, such as a PPA being removed and is no longer available. Have a look at the answer to this question:

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W: GPG error: in.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]> W: Duplicate sources.list entry archive.canonical.com/ubuntu precise/partner i386 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_binary-i3‌​86_Packages) E:Encountered a section with no Package:header E:Problem with MergeList /var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_i18n_Trans‌​lation-en E:The package lists or status file couldn't be parsed or opened –  Harsh Dec 10 '12 at 10:48

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