It seems this is a frequent issue. Best bet is to view the list of hashes available at http://cdimage.ubuntu.com/ubuntu-mate/releases/16.04/release/SHA256SUMS and pick the correct iso filename to compare.
It seems this is a frequent issue. Best bet is to view the list of hashes available at http://cdimage.ubuntu.com/ubuntu-mate/releases/16.04/release/SHA256SUMS and pick the correct iso filename to compare.