To renew as standalone and restart apache
> sudo service apache2 stop sudo certbot certonly --standalone
Results in the following output:
Saving debug log to /home/peter/appdir/~/.certbot/logs/letsencrypt.log
Plugins selected: Authenticator standalone, Installer None
Please enter in your domain name(s) (comma and/or space separated) (Enter 'c'
to cancel): staging.spxtrader.com.au
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for staging.spxtrader.com.au
Waiting for verification...
Cleaning up challenges
Non-standard path(s), might not work with crontab installed by your operating system package manager