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After updating my system as usual from the terminal it goes on fetching updates but at last it shows the following messages. What does it mean and how do I fix the red icon. Actually to fix the red icon I updated but it isn't fixed. The message:

W: GPG error: http://ppa.launchpad.net trusty 
Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1DB8ADC1CFCA9579
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/i18n/Translation-en  Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.

And also I could not update recommended Updates, every time I hit Install off course after authentication a message pops up. How do I fix this annoying message. I want to run my system with anomaly(s). Who wouldn't? Required installtion of untrusted packages

muru
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user279506
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  • Try `sudo apt-get clean` followed by `sudo apt-get update` – Rohith Madhavan Dec 03 '14 at 09:27
  • Thanks man. The red Icon is gone but what about the error message about Problem no:1:- The message:-”http://ppa.launchpad.net trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1DB8ADC1CFCA9579 W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/i18n/Translation-en Hash Sum mismatch E: Some index files failed to download. They have been ignored, or old ones used instead.”"> I had two set of problems. Help is needed. – user279506 Dec 03 '14 at 09:37
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    for problem no. 1 try this:http://askubuntu.com/a/553030/294611 – Alex Jones Dec 03 '14 at 09:39
  • Otherwise `sudo rm /var/lib/apt/lists/*` and `sudo apt-get update` – Rohith Madhavan Dec 03 '14 at 09:42

1 Answers1

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Type the following commands in a Terminal -

sudo apt-get clean

sudo rm /var/lib/apt/lists/*

sudo apt-get update

This will remove your lists and fetch a new copy of it.

Otherwise, as suggested by @edwardtorvalds, try to import all the missing gpg keys.

Community
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Rohith Madhavan
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