$ sudo apt-get update
$ sudo apt-get install libjpeg-turbo8 

libjpeg-turbo8 is installed in your system.

Make ensure the libjpeg-turbo8 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libjpeg-turbo8 *

You will get with libjpeg-turbo8 package name, version, architecture and description in a table

libjpeg-turbo8 package basic information: