This is guide on how to configure linux (Ubuntu 18.04 LTS) on Inspiron 15 7591 Laptop, it assumes it's already installed and running, but you want to make it better and configure
Update on Apr 15, 2022: If you now installing Ubuntu on this laptop, Use Ubuntu 21.10 or above. Ubuntu 21.10 has support for audio, and bluetooth for this laptop.
Ubuntu on Dell Inspiron 7591 - Certification Details: https://certification.ubuntu.com/hardware/201903-26880
Canonical have tested this device and it's suppoed to work with Linux (Fingerprint will not work due to lack of drivers from Goodix).
This system was tested with 18.04 LTS, running the 5.0.0-1016-oem-osp1 kernel, so we will run same for better experience