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A frustrating experience that sometimes comes up is having Ubuntu complain that 
there are no network cards available, even though you do actually have one. I've 
seen this most often when purchasing a new physical server that contains the latest 
hardware. It can be very frustrating to power on a brand new server, only to realize 
you can't get a network connection at all. This is a classic symptom of needing an 
updated compatibility stack. Perhaps your network card was released after the 
release date of the current Ubuntu release. This scenario is a good example of why 
hardware enablement updates exist, and why you will probably end up using them 
sooner or later.
If you don't opt in to the HWE updates, your server will always have the same 
hardware enablement (kernel, drivers, and so on) as it did when your installed LTS 
release was first published. In that case, your kernel and related packages will only 
be updated when you install new security updates. At a later date, you can opt in to 
HWE updates manually if you wish. Generally, you only do this if you've added new 
hardware to a physical server that requires a new kernel. If your server is working 
perfectly fine, and you haven't added new hardware, there's probably no reason to 
install a new HWE stack.
If you do decide to utilize these updates, there are two ways to do so. You can opt in 
to the newer HWE stack while installing Ubuntu Server, or you can manually install 
the required packages. At the time of writing, Ubuntu 20.04 is new to the scene, so it 
remains to be seen if the updated packages will be made available with 20.04.2, but 
it's very likely given past history. The following screenshot shows the first screen 
of the installer for Ubuntu 18.04.4. Assuming Ubuntu 20.04 follows the same plan, 
you'll most likely see an option such as the one in the following screenshot once 
20.04.2 is released:
Figure 3.5: Main menu of the Ubuntu installer

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Chapter 3