plasma-widget-simplemonitor software package provides simple and compact system monitor, 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-simplemonitor
plasma-widget-simplemonitor is installed in your system.
Make ensure the plasma-widget-simplemonitor package were installed using the commands given below,
$ sudo dpkg-query -l | grep plasma-widget-simplemonitor *
You will get with plasma-widget-simplemonitor package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | KDE |
| Package | plasma-widget-simplemonitor |
| Version | 0.1-0ubuntu3 |
| Description | simple and compact system monitor |
| Sub Section | KDE |