To install Puppet Agent (Install), run the following command from the command line or from PowerShell: >. Copy puppet-agent --version 6.19.0 to Clipboard. To upgrade Puppet Agent (Install), run the following command from the command line or from PowerShell: >. Copy puppet-agent --version 6.19.0 to Clipboard. Sep 09, 2018 · Step 3: Installing and Upgrading Puppet on Agent Node. 7. Login to your agent node server and run the following command to install Puppet agent. Once you install Puppet agent, you may notice that an init script (/etc/init.d/puppet) has been generated for running the puppet agent daemon. Do not start puppet agent service now. # yum install puppet 8.