N00B Install Question/Problems

As the picture shows, I’ve successfully downloaded ArduCopter.elf, twice just to make sure. But the command given in the tutorial says command is not found.
Is there something obvious that I’m missing in the formatting? or what? I’m very anxious to start using my Navio+

You have to make the ArduCopter.elf executable.
“sudo chmod +x ArduCopter.elf” should do it.

Sorry, information about chmod was in the tutorial previously, but was lost during the transfer to the new docs. I’ll update it.