I have a machine who is using Apt-Cacher NG running on another machine as caching proxy.

When I try to run sudo apt-get update I get the following errors:

W: Failed to fetch gzip:/var/lib/apt/lists/partial/it.archive.ubuntu.com_ubuntu_dists_oneiric-updates_main_source_Sources  Hash Sum mismatch

W: Failed to fetch gzip:/var/lib/apt/lists/partial/it.archive.ubuntu.com_ubuntu_dists_oneiric-updates_main_binary-amd64_Packages  Hash Sum mismatch

W: Failed to fetch gzip:/var/lib/apt/lists/partial/it.archive.ubuntu.com_ubuntu_dists_oneiric-updates_universe_binary-amd64_Packages  Hash Sum mismatch

W: Failed to fetch gzip:/var/lib/apt/lists/partial/it.archive.ubuntu.com_ubuntu_dists_oneiric-updates_main_binary-i386_Packages  Hash Sum mismatch

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

The directory /etc/apt/sources.list.d is empty.

To fix that I have already tried the following with no success:

Solution 1:

sudo rm -fr /var/lib/apt/lists

sudo mkdir -p /var/lib/apt/lists/partial

sudo apt-get clean

sudo apt-get autoclean

Solution 2:

sudo apt-get update -o Acquire::http::No-Cache=True

Any suggestion?