By the way, the ISO image called
"tde-ubuntu-4.14-desktop-latest-amd64.iso"
found in
http://tde-mirror.yosemite.net/trinity/cdimages/ubuntu/ is wrong.
Its environment is the Ubuntu Unity. I lost a cd media with this deception!
Nightly builds are not a good choice if you want everything to work right
every time. I'd suggest you use the .iso's here instead: