plasma-widget-runcommand software package provides plasma widget for running commands, 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 plasma-widget-runcommand
plasma-widget-runcommand is installed in your system.
Make ensure the plasma-widget-runcommand package were installed using the commands given below,
$ sudo dpkg-query -l | grep plasma-widget-runcommand *
You will get with plasma-widget-runcommand package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | KDE |
| Package | plasma-widget-runcommand |
| Version | 2.5-0ubuntu1 |
| Description | plasma widget for running commands |
| Sub Section | KDE |