How to install terminology emulator on Ubuntu 14.04?

Run the following commands:

sudo add-apt-repository ppa:enlightenment-git/ppa
sudo apt-get update
sudo apt-get install terminology

This will install the latest Terminology (currently, version 0.6.99).

This is not the stable release though. If you want the stable release (currently, version 0.3, and I don't think it's supported on Ubuntu 14.04 yet), replace ppa:enlightenment-git/ppa in the above steps with ppa:efl/trunk.

For Ubuntu 14.10, the correct installation sequence is:

sudo add-apt-repository ppa:niko2040/e19
sudo apt-get update
sudo apt-get install enlightenment
sudo apt-get install terminology