#22 0.I have been talking about systemd in a container for a long time. #22 0.639 debconf: (This frontend requires a controlling tty.) #22 0.639 debconf: unable to initialize frontend: Readline #22 0.633 debconf: falling back to frontend: Readline

#22 0.633 debconf: (TERM is not set, so the dialog frontend is not usable.) It seems that the debconf has an issue which we can see in this part: #22 0.633 debconf: unable to initialize frontend: Dialog #24 ERROR: process '/bin/sh -c apt install mysql-client' did not complete successfully: exit code: 100 - > RUN apt install mysql-client: - process '/bin/sh -c apt install mysql-client' did not complete successfully: exit code: 100 #24 0.990 E: Package 'mysql-client' has no installation candidate

#24 0.954 is only available from another source #24 0.954 This may mean that the package is missing, has been obsoleted, or #24 0.954 Package mysql-client is not available, but is referred to by another package. #24 0.512 WARNING: apt does not have a stable CLI interface. #23 0.766 Get:5 buster/mysql-apt-config amd64 Packages #23 0.571 Hit:4 bullseye-updates InRelease #23 0.568 Hit:2 bullseye-security InRelease #22 0.958 Use of uninitialized value $val in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84, line 6. RUN bash -c 'debconf-set-selections line 6. RUN bash -c 'export DEBIAN_FRONTEND=noninteractive' RUN apt-get update & apt-get install -y lsb-release debconf-utils If I skip the command RUN dpkg -i mysql-apt-config_0.8.24-1_all.deb and subsequent commands, then when running the container, I can execute the installation of mysql-apt-config manually, and install mysql-client without issue. It seems that the installation of mysql-apt-config_0.8.24-1_all.deb does not fully work as intended, because I get the error Package 'mysql-client' has no installation candidate. I'm trying to install the package mysql-client in a node:latest Docker container silently, from the Dockerfile.

Debian container