I noticed that Ubuntu 20 Release, comes with many unmet dependencies with some of them already deprecated and almost impossible to install. I see this when I try to install Packet Tracer and it outputs that requires many dependencies that at the same time need to install other dependencies.
Note: If you have a solution, I hope it worked out for you on a VM with Ubuntu 20 before suggesting it.
m@m:~/Desktop$ sudo dpkg -i PacketTracer_730_amd64.deb Selecting previously unselected package packettracer. (Reading database ... 207479 files and directories currently installed.) Preparing to unpack PacketTracer_730_amd64.deb ... Unpacking packettracer (7.3.0) ... dpkg: dependency problems prevent configuration of packettracer: packettracer depends on libdouble-conversion1; however: Package libdouble-conversion1 is not installed. packettracer depends on qt-at-spi; however: Package qt-at-spi is not installed. dpkg: error processing package packettracer (--install): dependency problems - leaving unconfigured Processing triggers for gnome-menus (3.36.0-1ubuntu1) ... Processing triggers for desktop-file-utils (0.24-1ubuntu2) ... Processing triggers for mime-support (3.64ubuntu1) ... Processing triggers for shared-mime-info (1.15-1) ... Errors were encountered while processing: packettracer
EDIT: The main problem, is with qt-at-spi, libdouble-conversion1 I was able to install manually.
The following packages have unmet dependencies: qt-at-spi : Depends: libqt4-dbus (>= 4:4.8.0) but it is not installable Depends: libqtcore4 (>= 4:4.8~) but it is not installable Depends: libqtgui4 (>= 4:4.8~) but it is not installable