It most likely sounds difficult to understand because you are not familiar with it. Try working through the first few exercises in SICP; you'll see that it can be quite straightforward.
As someone who's spent many, many hours proving things in Coq, I concur with the original post--pointfree stuff is usually much less easy to read than the same function with named variables. A lot of that comes down to not being able to tell what's going on at all if you don't already know the arity of the functions you're using.
There are plenty of people working hard and making sacrifices who will never be well-off financially. Good work ethic is an advantage, but does not guarantee a good life.
Try it out... install Ubuntu using WSL2. Install docker using apt-get. See that it doesn't work without the Docker Desktop install for Windows and a special integration. Try running podman or other container-based solutions and see that they don't work.
Having followed the instructions from https://docs.docker.com/engine/install/ubuntu/, I was able to get this working fine. This is without Docker Desktop installed. It probably would have also worked with the version from distro repository.
zed@ZED-PC:~$ sudo service docker start
* Starting Docker: docker [ OK ]
zed@ZED-PC:~$ sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
b8dfde127a29: Pull complete
Digest: sha256:f2266cbfc127c960fd30e76b7c792dc23b588c0db76233517e1891a4e357d519
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
The full output for 'docker run' was much longer, so I've snipped it down to size
Are you even on Windows? This is with WSL 2, as you can systemd doesn't work as expected in WSL2. This is a known issue. If systemd is working for you, then you are doing something magic:
sudo systemctl start docker
[sudo] password for u3332:
System has not been booted with systemd as init system (PID
1). Can't operate.
Failed to connect to bus: Host is down
Did you install docker from their own PPA linked in the instructions above, and are you on Ubuntu 20.04 with WSL2? Those are the only steps I took.
e:
ver
on 'cmd' also shows
Microsoft Windows [Version 10.0.19042.928]
if that helps
e:
Everything except the service start, which I had to find in that StackOverflow thread. We've hit the max comment depth, so I couldn't response to you directly.
If you run the Docker daemon manually, it works just fine. I'm running a container on it right now.
It's not a problem with Docker on WSL 2, but a problem with the way WSL uses its own init system instead of systemd, while some Ubuntu packages are packaged for a systemd system.
