The major parts of any distro are just bootloader, kernel, init, shell, and package system. The filesystem isn’t “part” of the distro, it’s just an abstraction layer to work with data on the drive, and should be considered independent of the packaged distribution itself.
With the above, you can run the basics of Linux on a device. The DE is not needed, and included packages and libraries are at the discretion of the maintainers. The included choices of all the above is the only thing that differentiates each distro.
If it helps in your understanding at all, back in the day, in order to install something like Slackware, you had to build each layer of these things manually like so: format and partition disk from disk in DOS, copy bootloader to newly partitioned HDD, boot to single user mode, compile kernel, add entries to bootloader, reboot from disk to Linux kernel, open TTY, set user and shell, reboot again, compile DE, set init level and basic services, reboot to DE, and then you had a Desktop.
A using a spare desktop as a headless VM server would be a good way to practice your CLI skills. Don’t install a GUI, or web admin tool, and only use SSH to admin it.
From there, setup a couple of VMs for Arch or Gentoo testing. Eventually, a Linux From Scratch attempt would provide a lot of learning opportunities.
You pretty much got it, except for the fifth point.
A desktop environment (“DE”) is separate from the compositor (X11 or Wayland), but can’t exist without it.
At the end of the day, a DE is really just a “window manager” with a bunch of bundled applications, like taskbars/panels, a file manager, an app menu, etc. It’s as minimal or as feature rich as you want it to be.
The window manager dictates what to draw on the screen and where, but the compositor is what actually does the work. One is kind of useless without the other.
Hopefully that makes sense, I’m not a rocket surgeon.
Fun fact, the init process can be anything, even /bin/bash or a shell script. But if it ends or dies so does the system, and of course you want extra features like multiuser capability, better interface etc. So it’s typically a more complex system like you said, that starts a bunch of other things. But you can still see the init process with PID 1 there in the process list. 😊
Try installing Gentoo. Follow their installation instructions. I was able to install it, but failed to install a DE. So, got a console going and couldn’t go further. That was about 2 years ago. I have an extra laptop that I always install stuff on to learn.
If you have an android phone, you can plug it in via USB and enable USB Internet tethering, which will give you working internet access on your machine to do the Wi-Fi debugging with.
I really do recommend doing a Gentoo install at some point, because I think you would learn a lot from it. It’s a really nice experience and a well put together distro. The compiling is potentially not as bad as you think, but there are a couple of packages that are notoriously painful to compile (there are prebuilt binaries available for some of the painful ones if desired too). You’d probably get a decent amount out of an Arch install too. Arch isn’t my cup of tea, but lots of people like it and it’d be quicker to get started than Gentoo. I’m not sure I’d recommend it for you at this stage but eventually you should check out NixOS too! You can even try the package manager out on any distro you want. NixOS is really interesting, but it does things a bit different from other distros, and if you’ve done an Arch / Gentoo install it’ll be interesting to see what NixOS does in contrast.
Other things to mess with… You mention partitioning, so make sure to check out LVM, and also consider reading a bit about filesystems. Maybe give btrfs a go :).
I wouldn’t worry about daily driving either Gentoo or Arch. Once you have them set up you’ll probably be fine.
I don’t think it’s that clear cut to be honest. More code doesn’t mean the package benefits more from optimizations at all, and even if that were true you might care more about the performance of the kernel or various small libraries that are used by a lot of programs as opposed to how fast some random application that depends on qt-WebKit is:
“I’ve been considering installing Arch the traditional way, on my X220, as a way to force myself to improve.”
I use Arch and so does my wife (she has no idea). The wiki is legendary because it is well used (I’ve written a few bits myself). I’ve used Gentoo for quite a while too but you will find compilation times a bit of a bore.
I own an IT company - I am the MD. I use Arch actually! (and so does my wife)
Not really. Dnf is slower and Fedora prompts to reboot to install updates.
There also is a slight different system setup with a different kernel and different automatic mounts. It won’t make any difference unless you are tweaking your system at a fairly low level.
A discarded Windows laptop is ideal for use with Linux. That’s what this Managing Director of an IT company has been doing for over a decade. My desktop PC is a customer cast off from a good five years ago. I slapped in an ageing Nvidia el cheapo card to get two monitors running. My laptop is a cast off from one of my employees - I simply opened it up and moved my M.2 card into it.
I do run ESET on my Linux gear to show solidarity and to show that Linux really is rather more resource friendly than Windows. I login to AD and I use Evolution with Kerb to access Exchange for email. I have the same “drive mappings” to the same file servers too and so on and so forth.
I used to teach word processing, spreadsheeting and databases n that for UK govt funded courses, I’ve written a Finite Capacity planner for a factory in Excel (note the lack of In-). I still find people who have no idea how decimal tab stops work or how to efficiently use styles. I can confidently inform you that Libre Office is just as good as MSO. They both have their … issues but both work pretty well.
Kids are easy. Adults are a pain! KDE has a lot of educational games ready to go out of the box.
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