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David S.
Asked: 2011-02-16 07:37:59 +0800 CST

hash sum mismatch when updating ubuntu 10.10

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i got this error when executing "apt-get update", and only this file failed to download.

Failed to fetch http://extras.ubuntu.com/ubuntu/dists/maverick/main/source/Sources.bz2    Hash Sum mismatch
Some index files failed to download, they have been ignored, or old ones used instead.

this error has been repeated for a while. how can i fix this?

i tried both the servers in my country, and the main server in the US. both give the same results. i am not behind any cache server.

update ubuntu-10.10

2 Answers

  1. Best Answer

    Usually, you can get rid of those errors by doing:

    root@host:~# apt-get clean
root@host:~# cd /var/lib/apt
root@host:/var/lib/apt# mv lists lists.old
root@host:/var/lib/apt# mkdir -p lists/partial
root@host:/var/lib/apt# apt-get update

    As I understand it, these errors occur mainly when you're behind a caching proxy.

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  2. It's not their fault, the checksum from http://extras.ubuntu.com/ubuntu/dists/maverick/Release matches the md5sum/sha1sum/sha256sum of http://extras.ubuntu.com/ubuntu/dists/maverick/main/source/Sources.bz2.

    Such checksum errors are often caused by a bad network connection. Have you set up some kind of caching server between your server and the Internet?

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