$ sudo apt-get update
$ sudo apt-get install libethumb-client1 

libethumb-client1 is installed in your system.

Make ensure the libethumb-client1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libethumb-client1 *

You will get with libethumb-client1 package name, version, architecture and description in a table

libethumb-client1 package basic information: