Error when i try to install programs on the terminal.What to do??

Hello guys!!!
Im using kali linux with oracle virtual box and gott the download from Offensive Security VM Download Page and uploaded to virtual box.
It look like everything went rigth with the configuration but now when i try to update or install a program on the terminal i get this message:

E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?

Do you guys have a idea of what i should do to resolve this problem and get on learning more about the system.
Really apreciate if you would help me please.

Thanks and the best regards.

cabraaltas