I have a system which was designed for use by root only and I want to run an FTP server on it. The software I use handles authentication by using same username and password as OS itself. To me it looks safer to have another user for FTP data transfer and another which would just run FTP server.
So here's my problem: As I've said, system was designed to be used only by root and there's no useradd or anything similar, as far as I can see. Is it possible to add user by hand?
I'm running OpenWRT Backfire 10.03.1-rc4, if it matters, but generic answers would be best.