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Hello,
This sounds like a command is being executed which causes the issue for you. There are a few things that I would recommend checking:
- last
The output will look like this:
root pts/0 USER_IP Fri Apr 24 15:11 still logged in
root pts/0 USER_IP Thu Apr 23 17:23 - 20:49 (03:26)
root pts/0 USER_IP Wed Apr 22 16:25 - 20:12 (03:47)
root pts/0 USER_IP Wed Apr 22 08:40 - 11:19 (02:39)
That way you will be able to tell if someone from anther IP address is accessing your Droplet.
- history
That way you will be able to see which command caused the problem
Enable backups for your Droplet, that way you will be able to restore to a working backup rather than starting from scratch every time there is a problem
Configure your firewall so that you could restrict some of the access to your Droplet. You can take a look at this tutorial here on how to do that:
https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-with-ufw-on-ubuntu-18-04
Let me know how it goes! Regards, Bobby