How do Linux, CachyOS, Hyprland, Wayland, and Noctalia fit together?

Wayland is a protocol—a set of rules for how graphical programs and the compositor communicate. The compositor is the program that actually combines windows and presents the result on your display. Hyprland is one compositor that implements Wayland. The older alternative is the X11 system, commonly provided through X.Org.

Noctalia is an additional desktop-shell project used with setups such as Hyprland. It can provide interface elements like panels, widgets, an application launcher, notifications, wallpapers, and other visual controls. In other words, Hyprland manages windows, while Noctalia can supply much of the surrounding desktop interface.

Hyprland is a Wayland compositor that also acts as a tiling window manager. It places application windows on the screen, handles focus, resizing, workspaces, effects, and similar behavior. It isn’t a complete desktop environment by itself, so you usually add separate components such as a launcher, notifications, wallpaper manager, status bar, and settings tools.

A full desktop environment like KDE Plasma or GNOME bundles those pieces together. Hyprland setups are more modular, which gives you lots of control but means you may need to choose and configure more components yourself.

Linux itself is primarily the kernel—the part that manages hardware, memory, processes, and communication between software and the computer. A usable operating system also needs many other components, such as system services, command-line tools, drivers, applications, and a graphical interface.

A distribution, or distro, packages those pieces into an installable system. CachyOS is a distribution based on Arch Linux, with its own package choices, configuration, tools, and optimizations. Other distributions make different choices, but they can still use many of the same underlying projects.