as you saw on the title, I got the "Failed to fetch... Hash Sum mismatch" Error. I have tried this method:
sudo rm -rf /var/lib/apt/lists/*
sudo apt-get update
But it didn't work. I still got the same error.
Err http ://vn.archive.ubuntu.com trusty-updates/universe amd64 Packages
Get:99 http ://vn.archive.ubuntu.com trusty-updates/universe amd64 Packages [1,789 B]
Get:100 http ://vn.archive.ubuntu.com trusty-updates/main i386 Packages [1,789 B]
Fetched 28.3 MB in 5min 15s (89.8 kB/s)
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty/main/source/Sources Hash Sum mismatch
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/source/Sources Hash Sum mismatch
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages Hash Sum mismatch
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-i386/Packages Hash Sum mismatch
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-i386/Packages Hash Sum mismatch
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/i18n/Translation-en Hash Sum mismatch
W: Failed to fetch http://vn.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/i18n/Translation-en Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.
Please help! Thank you a lot!