$ sudo apt-get update
$ sudo apt-get install puppet-module-puppetlabs-apt 

puppet-module-puppetlabs-apt is installed in your system.

Make ensure the puppet-module-puppetlabs-apt package were installed using the commands given below,

$ sudo dpkg-query -l | grep puppet-module-puppetlabs-apt *

You will get with puppet-module-puppetlabs-apt package name, version, architecture and description in a table

puppet-module-puppetlabs-apt package basic information: