$ sudo apt-get update
$ sudo apt-get install openstreetmap-client 

openstreetmap-client is installed in your system.

Make ensure the openstreetmap-client package were installed using the commands given below,

$ sudo dpkg-query -l | grep openstreetmap-client *

You will get with openstreetmap-client package name, version, architecture and description in a table

openstreetmap-client package basic information: