I have Ubuntu 16.04 64b Desktop installed on a HP Touchsmart (with LVM); associated with I that spent quite some time setting up an unusual application with it. Now I need to run another different application but it will not install & run properly on 16.04, instead requires 14.04 (per its vendor).
So...I went to install Ubuntu 14.04 LTS Desktop expecting to set up a dual-boot configuration during the installation, but the 14.04 Desktop installer (running from DVD) reports back that it does not detect any existing OS installed already, and wants to wipe my HDD data. I do NOT want to wipe out my existing 16.04 installation with my primary app for that, as it was too much time/trouble to get everything working right.
How can I accomplish this dual boot with existing 16.04 and adding 14.04? (I haven't found a searchable answer, as all the other dual-boot Q&A seems to deal with an existing Windows OS.)