Whenever I reboot my droplet, the keys in the 'authorized_keys' file under /root/.ssh get deleted and a strange, UNKNOWN key, which I never inserted by any method, nor have I seen even in DO control panel, shows there already present. What is peculiar is that in the end of the key, where comment is written, "motherfucker" is written in these letters: "mdrfckr"
I've tried deleting all keys from this file and from my DO control panel and then inserting fresh keys thru DO control panel (thinking that perhaps DO control panel takes precedence and resets the contents of this authorized_keys file at every reboot). But DO control panel keys are there as expected, but they don't seem to have any effect in my logging efforts.
Due to this, every time my droplet reboots, I've to delete this key and insert 2 keys from myself, one ppk key for ftp, and another openssh key for bash terminal. After inserting them, I'm able to work/login normally.
Pls help. Lest there might be some intrusion into my droplet. (DO hasn't replied to my ticket yet, nor do I expect a fast reply from them ever. even their first reply doesn't contain anything useful, and is there just for the sake of that they replied).