indicator-power software package provides Indicator showing power state., 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 indicator-power
indicator-power is installed in your system.
Make ensure the indicator-power package were installed using the commands given below,
$ sudo dpkg-query -l | grep indicator-power *
You will get with indicator-power package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | GNOME |
| Package | indicator-power |
| Version | 12.10.6+14.04.20140411-0ubuntu |
| Description | Indicator showing power state. |
| Sub Section | GNOME |