If you've setup an SFTP using the step above, you can skip this one for now. I've included it because it's helpful, but because is also the fastest way of doing other key steps later on. Don't worry, this is going to be easy!
On your Mac, you have a terminal application installed by default.
Open it and wait for it to finish loading. Once it's loaded, enter the following line of code and your droplet IP number emailed to you by Digital Ocean, that's $ ssh root@IPnumber, then hit enter.
You'll be prompted to enter your password (also emailed to you by Digital Ocean). Enter it now (it's normal that you won't see characters appear on the screen... this also makes knowing if you've made a mistake very difficult so take your time).
You'll know you've made it in once you see a message like this appear on your terminal:
Then type : cd /var/www/
Hit enter. (This was to change the current directory [cd] into the /var/www/ one
You should see the directory get longer on the left:
Type "ls" (short for list) to see everything in this folder. You'll get this:
If you type "ls" again, you'll see what's inside the Ghost folder:
This is the same list of files and folders as in the step before when using Cyberduck and going to the /ghost/ folder.