I'm buying a Server from a person (that I don't know really well) and I want to make sure that the previous owner hasn't got any access anymore.
It's an Ubuntu Virtual Server and I already received the admin access (via shell).
How can I find out if there are still other accounts left, who are still able to access my server (e.g. with a still existing shell account, ftp or another type of user account)? And how can I delete them if these accounts exist?
Best regards, Jennifer