ncdu software package provides ncurses disk usage viewer, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ncdu
ncdu is installed in your system.
Make ensure the ncdu package were installed using the commands given below,
$ sudo dpkg-query -l | grep ncdu *
You will get with ncdu package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Administration Utilities |
| Package | ncdu |
| Version | 1.10-1 |
| Description | ncurses disk usage viewer |
| Sub Section | Admin |