during the installation, he should've set up a user account less priviledged than root. if he didnt, have him execute this command sequence as root:
Code:
[root@localhost root]# useradd USERNAME
[root@localhost root]# passwd USERNAME
Enter new password for USERNAME:
Confirm new password for USERNAME:
[root@localhost root]# logout
at this point he will return to a login prompt
have him log in as USERNAME
note: replace USERNAME with whatever he wants to use as a username
now: for a brief lesson, a breakdown of the commands we just used:
useradd - add a user to the system
passwd - change password (when root, issue command with a username to change that user's password. or, issue the command by itself to change the root password.)
logout - log out
<EDIT>
Afterthought: if the useradd command doesnt work, try adduser
</EDIT>