Possible Duplicate:
Trouble downloading updates due to “Hash sum mismatch” error
Everytime when I do sudo apt-get update, i get always this error:
Hit http://us.archive.ubuntu.com precise-backports/universe Translation-en
Fetched 2,141 kB in 8s (255 kB/s)
W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_main_source_Sources Hash Sum mismatch
W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_universe_source_Sources Hash Sum mismatch
W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-amd64_Packages Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.
I'm running ubuntu server 12.04 LTS.
