$ sudo apt-get update
$ sudo apt-get install galera-arbitrator-3 

galera-arbitrator-3 is installed in your system.

Make ensure the galera-arbitrator-3 package were installed using the commands given below,

$ sudo dpkg-query -l | grep galera-arbitrator-3 *

You will get with galera-arbitrator-3 package name, version, architecture and description in a table

galera-arbitrator-3 package basic information: