You have a very old OS: "Jessie"
The Rdarbox24's rbfeeder and mlat-client were first released when Stretch was the current OS. Their rbfeeder and mlat-client were therefore built for Stretch. Later when Buster was released, they built and made available packages for Buster also.
The rbfeeder's installation script checks the OS version.
If version is Stretch, it installs rbfeeder and mlat-client packages designed for Stretch.
If version is Buster, it installs rbfeeder and mlat-client packages designed for Buster.
If the OS is different from above two, it fails to install rbfeeder and outputs:
rbfeeder: "Dont know how to install for a distribution named "
mlat-client: "Package mlat-client is not available"
You can fool their installer to think that your OS is Stretch in the following way, and it will install packages of Stretch on Jessie.
(1) Download installation script and open it for editing
wget http://apt.rb24.com/inst_rbfeeder.sh
sudo nano inst_rbfeeder.sh
(2) In the editor, scroll down to following line
VERS=`lsb_release -c | awk -F ':' '{print $2}' | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'`
(a) Place a # at start of this line
(b) Add new line VERS=stretch
The code will become like this:
#VERS=`lsb_release -c | awk -F ':' '{print $2}' | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'`
VERS=stretch
Save file (Ctrl+O) and close editor (Ctrl+X)
(3) Run the installation script
sudo bash inst_rbfeeder.sh
Most likely the installation will succeed.
I got further this time thank you. Now I have this issue. I have attempted to install both of these, first one says it installed fine, and the second says I have the most recent version;
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
rbfeeder : Depends: libncurses5 (>= 6) but 5.9+20140913-1+deb8u3 is to be insta lled
Depends: libtinfo5 (>= 6) but 5.9+20140913-1+deb8u3 is to be install ed
E: Unable to correct problems, you have held broken packages.
Do you wish to install dump978-rb program? (y/n) y
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package soapysdr-module-rtlsdr is not available, but is referred to by another p ackage.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'soapysdr-module-rtlsdr' has no installation candidate