ed software package provides classic UNIX line editor, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ed
ed is installed in your system.
Make ensure the ed package were installed using the commands given below,
$ sudo dpkg-query -l | grep ed *
You will get with ed package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Editors |
| Package | ed |
| Version | 1.10-2 |
| Description | classic UNIX line editor |
| Sub Section | Editors |