I recently migrated my WordPress installation from an old Debian 8 Google Cloud instance to Debian 9. I decided to do the installation myself this time instead of using a Bitnami image for greater control. I couldn’t get certbot (a Let’s Encrypt client for free SSL certificates) to work on the Bitnami image so I figured I’d set everything up myself.
I ran into one problem that took me a while to debug and figure out. I relinked my site to Jetpack to get basic analytics and automatic sharing to LinkedIn, but Jetpack couldn’t communicate with my site.