For computer security reasons – the first thing you should do after installing the system is to create an administrator user, which belongs to the sudo group in Debian-based systems or the wheel group in Red Hat and Fedora compatible systems.
Next, if possible, you should disable the root account.
To disable root account you should issue in the terminal command : sudo passwd -l root.
Furthermore, for everyday computer use, you should have and use a standard user account in your operating system, without administrator privileges. This is a crucial piece of advice from a computer security perspective.