Questions[naming](ubuntu)

In GRUB Kubuntu 18.04 LTS is named just "Ubuntu".

Here's part of tlp-stat output (Kubuntu 18.04 LTS is named here "Ubuntu 18.04 LTS"):

+++ System Info
System         = LENOVO ThinkPad X200s 7470BB1
BIOS           = 6DET60WW (3.10 )
Release        = Ubuntu 18.04 LTS
Kernel         = 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64
/proc/cmdline  = BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=22ed8f7d-5226-4f0a-a497-2889c2b9e647 ro quiet splash vt.handoff=1
Init system    = systemd v237
Boot mode      = BIOS (CSM, Legacy)

I'm dualbooting Kubuntu 18.04 LTS with Windows 10. I was dualbooting Ubuntu 18.04 LTS with Windows 10 before. I replaced Ubuntu 18.04 LTS with Kubuntu 18.04 LTS by formatting Ubuntu's partitions (swap, / and /home) and installing Kubuntu on them.

Did I mess something up? Should names "Ubuntu" instead of "Kubuntu" bother me? My biggest concern is TLP not recognising Kubuntu properly and consequently not handling battery life as well as before.

I want to create links to software within Software Center using the APTURL - However, I'm not sure how to find out the true "package name". What is the easiest way to discover a package's name for use with the APTURL or apt-get command?

Why is the default background image still named /usr/share/backgrounds/warty-final-ubuntu.png?

It's not Warty,

and it's not even a PNG:

$ file /usr/share/backgrounds/warty-final-ubuntu.png
/usr/share/backgrounds/warty-final-ubuntu.png: JPEG image data, JFIF standard 1.02