Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?
By LUNA#6969 at Nov 27 2020
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?
By Dana Hand at Nov 02 2020
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?
By Kim Hilll at Jan 08 2021