Hey Mike!
We do not have an instructional guide on using WP-CLI to print out the contents of your pages/posts. That command would simply be run using an SSH connection from the directory that WordPress is installed in (if WP-CLI is already installed). However, this depends on where you are hosting the website, there may be limitations on access as well. Depending on who your host is, I may be able to advise further, so let me know!
Best Regards,
Carlos