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Here is log.

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used.
GPG error: http://ppa.launchpad.net trusty Release: The following signatures were invalid: BADSIG D530E028F59EAE4D Launchpad PPA for NoobsLab
W: Failed to fetch ppa.launchpad.net/noobslab/apps/ubuntu/dists/trusty/Release  
W: Failed to fetch us.archive.ubuntu.com/ubuntu/dists/precise-updates/main/source/Sources  Hash Sum mismatch
W: Failed to fetch ppa.launchpad.net/noobslab/apps-dependencies/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found
W: Failed to fetch ppa.launchpad.net/noobslab/apps-dependencies/ubuntu/dists/trusty/main/binary-i386/Packages  404  Not Found
W: Some index files failed to download. They have been ignored, or old ones used instead.
David Foerster
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Nhóc Emi
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  • 11.04 is beyond end of life. I highly advise you upgrade to a supported version of Ubuntu. Although you can find advice on how to use old repos, there are serious security vulnerabilities in 11.04 – Panther Mar 04 '15 at 05:39
  • Sorry. I wrong. My ubuntu is 14.04 – Nhóc Emi Mar 04 '15 at 05:40
  • sudo mv /etc/apt/sources.list /etc/apt/sources.list.backup .Then run sudo apt-get update – sohel4r Mar 04 '15 at 05:44
  • Use an alternate mirror – Panther Mar 04 '15 at 05:45
  • @sohel4r i get this :(

    W: Failed to fetch http://ppa.launchpad.net/noobslab/apps-dependencies/ubuntu/dists/trusty/main/source/Sources 404 Not Found

    W: Failed to fetch http://ppa.launchpad.net/noobslab/apps-dependencies/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found

    W: Failed to fetch http://ppa.launchpad.net/noobslab/apps-dependencies/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found

    E: Some index files failed to download. They have been ignored, or old ones used instead.

     – Nhóc Emi Mar 04 '15 at 05:57
  • Maybe you use old repo. try @bodhi.zazen – sohel4r Mar 04 '15 at 06:04
  • try rebooting your system and then try again – Faizan Akram Dar Mar 04 '15 at 06:04

0 Answers0