md5sum para todo o Ubuntu 14.04.x é o seguinte:
dccff28314d9ae4ed262cfc6f35e5153 *ubuntu-14.04-desktop-amd64.iso
c4d4d037d7d0a05e8f526d18aa25fb5e *ubuntu-14.04-desktop-i386.iso
01545fa976c8367b4f0d59169ac4866c *ubuntu-14.04-server-amd64.iso
08d25bf879e353686a974b7b14ae7d81 *ubuntu-14.04-server-i386.iso
119cb63b48c9a18f31f417f09655efbd *ubuntu-14.04.1-desktop-amd64.iso
a4fc15313ef2a516bfbf83ce44281535 *ubuntu-14.04.1-desktop-i386.iso
ca2531b8cd79ea5b778ede3a524779b9 *ubuntu-14.04.1-server-amd64.iso
3aa14ca13d52df070870d39306f4a4eb *ubuntu-14.04.1-server-i386.iso
b31731ea6cdbebe1d02f8193db420886 *wubi.exe
fonte: link