Login as a normal user.
When prompted, enter the root password. When you are finished, log out of the root sub-shell by pressing Ctrl+D or typing You should only use the root account where you have to
, as it has the capability to seriously damage your system. In particular, programs run by root are more susceptible to security attacks and viruses, unless they are specifically designed to be run as root.
For this purpose you can also run individual commands as root:
However, this way you have to keep entering your password each time.