W: Failed to fetch http://packages.linuxmint.com/dists/rebecca/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release  Unable to find expected entry 'restricted/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://extra.linuxmint.com/dists/rebecca/main/binary-amd64/Packages  Hash Sum mismatch

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