Ubuntu
update-manager package

Failed to download repository information. please help me fix this issue.

Asked by GOTCHA13

W:GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991, W:GPG error: http://extras.ubuntu.com quantal Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192, W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/maverick-backports/main/source/Sources 404 Not Found [IP: 91.189.91.14 80]
, W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/maverick-backports/restricted/source/Sources 404 Not Found [IP: 91.189.91.14 80]
, W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/maverick-backports/universe/source/Sources 404 Not Found [IP: 91.189.91.14 80]
, W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/maverick-backports/multiverse/source/Sources 404 Not Found [IP: 91.189.91.14 80]
, E:Some index files failed to download. They have been ignored, or old ones used instead.

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Ubuntu update-manager Edit question
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luuminh
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Best luuminh (taolao-q) said : 		#1

I got same error, I open update manager and change download from server for United States , every thing done

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michael (yellupcm-gmail) said : 		#2

Please read this site.

https://wiki.ubuntu.com/Releases

Maverick is EOL (End of Life). This is the reason you get the 404 code.

Revision history for this message
Manfred Hampl (m-hampl) said : 		#3

There are two potential explanations to your error:
1. you are running Ubuntu Maverick -> that release is end of life, the only reasonable solution is to upgrade to a supported release
2. you are running already a supported Ubuntu release, but you still have references to maverick in your sources.list -> the solution is to clean up your sources.list

To find out what the case really is, please open a terminal (e.g. by simultaneously pressing ctrl-alt-t) and issue these commands:

lsb_release -a
uname -a
find /etc/apt -name '*.list' -exec bash -c 'echo -e "\n$1\n"; cat -n "$1"' _ '{}' \;
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com A040830F7FAC5991
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 16126D3A3E5C1192

then select all output (by using the terminal menu entry "edit - select all"), ciopy it ("edit - copy") and paste as new message into this question document.

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GOTCHA13 (cinnamontoast13) said : 		#4

Thanks luuminh, that solved my question.