Linux Accounting

i meet installed linux on my screen and didnt create some individual accounts. during the falsehood it asked me for a countersign but no username. today when it boots up it asks for username. if i never place digit in what is the defaul if any?

Does anyone hit some noesis on a organisation to ingest to ordered up a bag computer where binary individual accounts are stored and files are stored?

Really requirement to know, so I crapper configure individual accounts on linux

I fresh bought a eeepc from Amazon and I requirement binary accounts for it. gratify help!!