libkidletime4 software package provides library to provide information about idle time, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libkidletime4
libkidletime4 is installed in your system.
Make ensure the libkidletime4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libkidletime4 *
You will get with libkidletime4 package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Libraries |
| Package | libkidletime4 |
| Version | 4:4.14.16-0ubuntu3 |
| Description | library to provide information about idle time |
| Sub Section | Libs |