Root login Ubuntu VM on Azure

Question

Installed Ubuntu Server LTS 14.04 from Azure library on Azure VM. Logged in as standard \"azureuser\" created by Azure with my password. Changed root password:

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Answer 1

I wasn't able to get any of the other answers to work for me, but this answer worked for my case.

For those too lazy to click the link:

ssh -i KEYPAIR.pem ubuntu@HOSTNAME   'sudo cp /home/ubuntu/.ssh/authorized_keys /root/.ssh/'