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When I trying to install 'nullmailer' in Ubuntu Jammy(22.04), it prompts to provide some required inputs like Mailname of your system:. Is there any way to avoid prompts while installing and configuring it post install ?

:/opt# dpkg -i ./nullmailer_2.2-3build1_amd64.deb
Selecting previously unselected package nullmailer.
(Reading database ... 67792 files and directories currently installed.)
Preparing to unpack .../nullmailer_2.2-3build1_amd64.deb ...
Unpacking nullmailer (1:2.2-3build1) ...
Setting up nullmailer (1:2.2-3build1) ...
debconf: unable to initialize frontend: Dialog
debconf: (No usable dialog-like program is installed, so the dialog based frontend cannot be used. at /usr/share/perl5/Debconf/FrontEnd/Dialog.pm line 78.)
debconf: falling back to frontend: Readline
Configuring nullmailer
----------------------

This is the fully-qualified host name of the computer running nullmailer. It defaults to the literal name 'me'.


Mailname of your system:


This is a colon-separated list of remote servers to which to send each message. Each entry contains a remote host name or address followed by an optional protocol string 'host protocol'.
The protocol name defaults to smtp, and may be followed by command-line arguments for that module.

Thanks.

Rama
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1 Answers1

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As explained in lot of threads, you can avoid questions doing this :

sudo DEBIAN_FRONTEND=noninteractive apt-get -yq install [packagename]

Then, you will need to configure the package. You can also use Ansible and these modules to automate the task and apply your configuration and install it in a non-interactive way.

Bertrand Cebador
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