Context for newbies: Linux refers to network adapters (wifi cards, ethernet cards, etc.) by so called "interfaces". For the longest time, the interface names were assigned based on the type of device and the order in which the system discovered it. So, eth0, eth1, wlan0, and wwan0 are all possible interface names. This, however, can be an issue: "the order in which the system discovered it" is not deterministic, which means hardware can switch interface names across reboots. This can be a real issue for things like servers that rely on interface names staying the same.
The solution to this issue is to assign custom names based on MAC address. The MAC address is hardcoded into the network adaptor, and will not change. (There are other ways to do this as well, such as setting udev rules).
Redhat, however, found this solution too simple and instead devised their own scheme for assigning network interface names. It fails at solving the problem it was created to solve while making it much harder to type and remember interface names.
To disable predictable interface naming and switch back to the old scheme, add net.ifnames=0 and biosdevname=0 to your boot paramets.
The template for this meme is called "stop doing math".
Gosh, tell me about it. I once tried writing a custom wifi signal strength indicator app that got its information from network-manager. Apparently the only way to programmatically communicate with network-manager is through dbus, which is just terrible. Scarce to no documentation, poor support for any language other than C/C++, and once you do get it working, it's the most disgusting and overly verbose code you've ever seen, just to query the status of the wifi card. Could've exposed the API through raw unix sockets or something, but nope, they had to reinvent the wheel on that one as well.
I'll take this opportunity to shill for Void Linux, it sounds like exactly what you're describing. I've been a happy user for like 5 years now. I particularly like how nothing ever breaks, because there's not much to break on such a minimal system.
...well, actually, a few things did break over the years, but most of those were due to user error haha.
In news that will shock no-one, dbus was, of course, initially created by a Redhat engineer. I get the idea of having a general purpose bus that everything can communicate on, but they somehow managed to even make that complex.
You make a compelling case for Void Linux. I use Debian or a RHEL derivative for work, primarily so there's at least a chance to hand systems off to someone else to maintain, the less known distros seem to meet with blank looks.
I want to give NixOS a try sometime, as I like the idea of declaritively defining the system
That seems to be even more convoluted and complex.
"Just one more abstraction layer, I swear!"
I'm a NixOS noob bytheway, so please correct me if I'm wrong.
I think the difference is the level it's happening at. As I said, I haven't tried it yet, but it looks like a simple, unfussy and minimal distribution that you then add functionality to via configuration. Having that declarative configuration means it's easy to test new setups, roll back changes and even easily create modified configuration for other servers.
I use nixos on my homeserver, but I'm looking to switch it to Void as well. For me personally I just realized that it's easier to set everything up with shell scripts and docker-compose. But that's just my personal experience, by all means go ahead and try out nixos if you have the time. It has lots of unique features that you can't replicate with "just a bunch of shell scripts". This video does a great job of selling nixos. Maybe my favourite part of nixos is how they make "shortcuts" for a lot of common tasks. For example, setting up a letsencrypt ssl certificate for your webserver with autorenewal can be done in just two lines of config.