N: Ignoring file '20auto-upgrades.ucf-old' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension
W: Failed to fetch http://ubuntu.trumpetti.atm.tut.fi/ubuntu/dists/trusty-updates/main/source/Sources  Hash Sum mismatch

W: Failed to fetch http://ubuntu.trumpetti.atm.tut.fi/ubuntu/dists/trusty-updates/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://ubuntu.trumpetti.atm.tut.fi/ubuntu/dists/trusty-updates/main/binary-i386/Packages  Hash Sum mismatch

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