So what happens when your system boots?
Well, it all starts at the UEFI, which is the Hardware Firmware Interface.
And the first thing that matters from a Linux perspective is GRUB, the Grand Unified Bootloader.
So from GRUB, the kernel is found.
And the kernel works together with its helper, the initramfs.
You don't often deal with initramfs directly, but it's an important part that allows your
system to boot.
Once these are loaded, systemd can be loaded, and systemd is taking care of everything.
Let me use a different core to identify that.
In systemd, we have one phase, which is early boot.
Early boot is where your hardware devices, your mounts, et cetera, are activated.
And next, in the next part of boot, the services will be loaded.
And in the end, it will all end with a shell.
And the shell is where the user can work with the Linux operating system.
It can be a graphical shell, or it can be a text-based shell, running nothing but bash.