sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  apport apport-gtk python3-apport python3-problem-report thunderbird
  thunderbird-gnome-support
6 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
Need to get 33.0 MB/33.3 MB of archives.
After this operation, 301 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://au.archive.ubuntu.com/ubuntu/ trusty-updates/main thunderbird amd64 1:38.8.0+build1-0ubuntu0.14.04.1 [33.0 MB]
Fetched 6,659 kB in 2s (3,116 kB/s)    
E: Failed to fetch http://au.archive.ubuntu.com/ubuntu/pool/main/t/thunderbird/thunderbird_38.8.0+build1-0ubuntu0.14.04.1_amd64.deb Hash Sum mismatch

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?