$ sudo apt-get update
$ sudo apt-get install libgimpactutils2.81 

libgimpactutils2.81 is installed in your system.

Make ensure the libgimpactutils2.81 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libgimpactutils2.81 *

You will get with libgimpactutils2.81 package name, version, architecture and description in a table

libgimpactutils2.81 package basic information: