Add Usage section

README.md

@@ -49,6 +49,58 @@ FireZone requires a valid SSL certificate and a matching DNS record to run in pr
 6. Finally, create an admin user with `sudo firezone-ctl create_admin`. Check the console for the login credentials.
 7. Now you should be able to log into the web UI at `https://<your-server-fqdn>`
 
+## Usage
+
+FireZone can be managed via the `firezone-ctl` command, as shown below. Most subcommands require prefixing with `sudo`.
+
+```shell
+I don't know that command.
+omnibus-ctl: command (subcommand)
+create_admin
+  Create an Admin user
+General Commands:
+  cleanse
+    Delete *all* firezone data, and start from scratch.
+  help
+    Print this help message.
+  reconfigure
+    Reconfigure the application.
+  show-config
+    Show the configuration that would be generated by reconfigure.
+  uninstall
+    Kill all processes and uninstall the process supervisor (data will be preserved).
+  version
+    Display current version of Firezone
+Service Management Commands:
+  graceful-kill
+    Attempt a graceful stop, then SIGKILL the entire process group.
+  hup
+    Send the services a HUP.
+  int
+    Send the services an INT.
+  kill
+    Send the services a KILL.
+  once
+    Start the services if they are down. Do not restart them if they stop.
+  restart
+    Stop the services if they are running, then start them again.
+  service-list
+    List all the services (enabled services appear with a *.)
+  start
+    Start services if they are down, and restart them if they stop.
+  status
+    Show the status of all the services.
+  stop
+    Stop the services, and do not restart them.
+  tail
+    Watch the service logs of all enabled services.
+  term
+    Send the services a TERM.
+  usr1
+    Send the services a USR1.
+  usr2
+    Send the services a USR2.
+```
 
 ## Architecture