Installation of Flexi on Debian 10

apt-get install gdebi-core gnupg2

wget https://download.flexibee.eu/download/2019.3/2019.3.1.3/flexi_2019.3.1.3_all.deb

wget http://security.debian.org/debian-security/pool/updates/main/o/openjdk-8/openjdk-8-jre-headless_8u232-b09-1~deb9u1_amd64.deb

wget http://security.debian.org/debian-security/pool/updates/main/o/openjdk-8/openjdk-8-jdk-headless_8u232-b09-1~deb9u1_amd64.deb

gdebi openjdk-8-jre-headless_8u232-b09-1~deb9u1_amd64.deb

gdebi openjdk-8-jdk-headless_8u232-b09-1~deb9u1_amd64.deb

nano /etc/java-8-openjdk/accessibility.properties # comment out the line: assistive_technologies=org.GNOME.Accessibility.AtkWrapper

update-alternatives --config java # select java 8

echo "deb http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main" >> /etc/apt/sources.list

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

apt-get update

apt-get install postgresql-9.6 postgresql-pltcl-9.6

dpkg-reconfigure locales # select cs_CZ.utf8

(reboot)

gdebi flexi_2019.3.1.3_all.deb

systemctl status Flexi