We also recognized this issue on two laptops and downloaded one package which should be updated with wget manually:
$ md5sum firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb* 1577ff1303d995196bf47362feef7e5f firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb ca062374dadbe009bda1bc4ae49d29cb firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.1 216ff072772aad7c442158d341cc0882 firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.2 => Every time a different content! So I changed the network cable from the Thunderbolt dock to the internal network adapter and now it works: $ md5sum firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb* 1577ff1303d995196bf47362feef7e5f firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb ca062374dadbe009bda1bc4ae49d29cb firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.1 216ff072772aad7c442158d341cc0882 firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.2 13a869e979b64bb8d0fefb0f8966b063 firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.3 13a869e979b64bb8d0fefb0f8966b063 firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.4 13a869e979b64bb8d0fefb0f8966b063 firefox_62.0+build2-0ubuntu0.18.04.4_amd64.deb.5 We are using kernel 4.15.0-34-generic with Dell Precision 7530 and TB18 dock. The wget finishes with exit code 0 and the size of the file is always the same. ** Changed in: apt (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1785778 Title: Hash Sum mismatch Ubuntu Server 18.04.1 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1785778/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs