Experience the following?:
<snipped> ... ... Hit http://us.archive.ubuntu.com trusty-backports/multiverse Translation-en Hit http://us.archive.ubuntu.com trusty-backports/restricted Translation-en Hit http://us.archive.ubuntu.com trusty-backports/universe Translation-en Ign http://us.archive.ubuntu.com trusty/main Translation-en_US Ign http://us.archive.ubuntu.com trusty/multiverse Translation-en_US Ign http://us.archive.ubuntu.com trusty/restricted Translation-en_US Ign http://us.archive.ubuntu.com trusty/universe Translation-en_US W: Failed to fetch http://us.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. |
The cause is likely a corrupt package file previously downloaded. You can fix it by doing the following:
sudo rm -rf /var/lib/apt/lists/* sudo apt-get update |
If deleting /var/lib/apt/lists/* does not work…
(esp. if you’re behind a proxy), fix “Hash Sum Mismatch” like this:
Create file
*/etc/apt/apt.conf.d/99fixbadproxy*
with this content
Acquire::http::Pipeline-Depth 0;
Acquire::http::No-Cache true;
Acquire::BrokenProxy true;
See also https://gist.github.com/trastle/5722089