Here’s the step by step guide on how to install the plugin:
Download the plugin here.
Login to your WordPress Admin and navigate to Plugins.
Click Add New from the Plugins menu and upload the plugin by choosing the zip file you have downloaded.
Click Install Now button and you should see this message when you have successfully installed the plugin.
Click Activate Plugin button to activate the plugin and you’re done! Ultimate LinkedIn Integration should now be in your activated Plugins list.
You can also install the plugin without downloading. Just go to the Plugins menu and click Add New then search “LinkedIn Login”. Click Install Now button on the search result and it will be installed.