I am facing the the following issue as i ran some permission on sudo.
"sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set"
I think to resolve this issue, the following steps should work.
Switch to ...
For that you have to Contact Support (https://cloud.digitalocean.com/support/tickets).
Open a ticket and ask them to mount Recovery ISO on your Droplet.