Statement "We assume you have ssh'ed into the robot." is pointless if you want the user to SSH into robot just few paragraphs further.
Changed the boxes of commands to appropriate ones. Removed "ubuntu@NEWHOSTNAME:$" since it's harder to just copy-paste the code. removed unnecessary error. Clarified the section about the virtual machine.
Statement "We assume you have ssh'ed into the robot." is pointless if you want the user to SSH into robot just few paragraphs further. Changed the boxes of commands to appropriate ones. Removed "ubuntu@NEWHOSTNAME:$" since it's harder to just copy-paste the code. removed unnecessary error. Clarified the section about the virtual machine.