Hi Dave, log in to flightaware.com then visit your PiAware and you’ll see your status page.
Click on “View your site statistics” to get to your stats page. You’ll see your site listed in an orange bar. At the end of the bar is a gear icon.
Click that and in there are options for rebooting, etc.
You can also enable remote SSH. To do that, get the SDcard and pop it into your computer. This will mount the /boot partition. In there create a file called ‘ssh’. Put the card back in the RPi and now SSH will be enabled with username ‘pi’ and password ‘flightaware’. In there you can do all the usual Linuxy stuff, edit files, reboot etc.