Ubuntu Repository
First add the FusionDirectory tools and libraries repositories
Add a file named fusiondirectory-integrator.list in /etc/apt/sources.list.d/
#fusiondirectory integrator
deb https://public.fusiondirectory.org/debian/fusiondirectory-integrator/ bullseye main
Add a file named fusiondirectory-utilities.list in /etc/apt/sources.list.d/
#fusiondirectory utilities
deb https://public.fusiondirectory.org/debian/fusiondirectory-utilities/ bullseye main
Add a file named fusiondirectory-tools.list in /etc/apt/sources.list.d/
#fusiondirectory tools
deb https://public.fusiondirectory.org/debian/fusiondirectory-tools/ bullseye main
Add a file named fusiondirectory-external-libraries.list in /etc/apt/sources.list.d/
#fusiondirectory libraries
deb https://public.fusiondirectory.org/debian/fusiondirectory-external-libraries/ bullseye main
Second install the repository corresponding to your distribution
Ubuntu Focal
Add a file named fusiondirectory-release.list in /etc/apt/sources.list.d/
#fusiondirectory repository
deb https://public.fusiondirectory.org/ubuntu/focal-fusiondirectory-release/ focal main
Ubuntu bionic
Add a file named fusiondirectory-release.list in /etc/apt/sources.list.d/
#fusiondirectory repository
deb https://public.fusiondirectory.org/ubuntu/bionic-fusiondirectory-release/ bionic main