as i remember for bt4 your in root shell already since your in root shell
try changing your password by typing root# passwd , It would prompt for a password then ask for confirmation key-in it again. After that do this I dont know which one works I am used to fedora before so type root# useradd "chorva" then after that #root passwd chorva so assign a password for the created user hope it helps. Anyways learning linux is really fun i might suggest visiting fedora forums just google it they have a lot how to's and categories are separated there. Community heads there are very helpful. One more thing try using or checking out
www.tldp.org or for example they are asking you or you wanna try out a new command you could always use the man command like man useradd means show manual for the command useradd or adduser. something like that hope it helps happy linuxing!!!
