I recently acquired a QNAP NAS, and I run Linux Mint, which is based off Ubuntu. Naturally, I downloaded QNAPQfinderProUbuntux64-7.12.3.0527.deb and tried to install it, since 99% of “Ubuntu” .debs will run on Mint just fine.
However, because of the way the preinst script in the .deb package checks the OS version number, it fails to install.
So I fixed it, tested it, and verified that it works on Ubuntu and anything derived from it, but don’t know where to submit my fixed script. There’s the “Developer Partner” page, but I’m not part of a development company - I’m just an end user.
The link above includes the revised version of preinst as well as preinst.diff showing what was changed.