Locked out on EC2 Ubuntu because of chmod?

Locked out on EC2 Ubuntu because of chmod? See this video and use the script below.

Content-Type: multipart/mixed; boundary=”//”
MIME-Version: 1.0

–//
Content-Type: text/cloud-config; charset=”us-ascii”
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=”cloud-config.txt”

#cloud-config
cloud_final_modules:
– [scripts-user, always]

–//
Content-Type:
text/x-shellscript; charset=”us-ascii”
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=”userdata.txt”

#!/bin/bash
chown root:root /home
chmod 755 /home
chown ubuntu:ubuntu /home/ubuntu -R
chmod 700 /home/ubuntu
chmod 700 /home/ubuntu/.ssh
chmod 600 /home/ubuntu/.ssh/authorized_keys
–//

error: Uh oh ...