Can pureos play comercial dvd's at all?

Software PureOS
22

I just tried this. It said:

dbrokaw@DRBL14:~$ apt --fix-broken install
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?