I have just booted my clean Ubuntu 18.04 LTS VM and tried to install some application with
sudo apt install.
But got error message:
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
What process created the /var/lib/dpkg/lock-frontend file in Ubuntu?
How to gently stop it and take manual control on APT?