How to Install a Package Without Debconf Prompt ?

To install any packet non-interactively, configure debconf into non-interactive prompt.

Open the terminal and enter,

sudo export DEBIAN_FRONTEND="noninteractive"

Now, pre-configure the values as,

echo package_name package_name/key {boolean,string} {true, some string} | sudo debconf-set-selections

Then proceed with package installation as,

sudo apt-get install package_name