Fast configuration for ZEVENET Community Edition APT repository:
1#
root@zevenetlb#> wget -O - http://repo.zevenet.com/zevenet.com.gpg.key | apt-key add -
2#
root@zevenetlb#> echo "deb http://repo.zevenet.com/ce/v5/ buster main" > /etc/apt/sources.list.d/zevenet.list
3#
root@zevenetlb#> apt update --no-list-cleanup -o Dir::Etc::sourceparts="-" -o Dir::Etc::sourcelist="sources.list.d/zevenet.list"
root@zevenetlb#> apt upgrade --with-new-pkgs -o Dir::Etc::sourceparts="-" -o Dir::Etc::sourcelist="sources.list.d/zevenet.list"
4#
root@zevenetlb#> apt-get install zevenet
5#
root@zevenetlb#> apt-get install zevenet-gui-core

More info here.