matchbox-keyboard software package provides on-screen keyboard, 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 matchbox-keyboard
matchbox-keyboard is installed in your system.
Make ensure the matchbox-keyboard package were installed using the commands given below,
$ sudo dpkg-query -l | grep matchbox-keyboard *
You will get with matchbox-keyboard package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Embedded software |
| Package | matchbox-keyboard |
| Version | 0.1+svn20080916-9 |
| Description | on-screen keyboard |
| Sub Section | Embedded |