An experimental operating system

Small.
Direct.
Kyron.

KyronOS is a small, text-first operating system for x86 PCs. Boot it, drop into the shell, and explore an OS being built from the ground up.

Get the latest release ↗ Explore the source
kyron — tty0
KyronOS
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[kyron]:~# help
available commands:
help clear version about echo
ls cd pwd go back home root
touch mkdir rmdir write append cat rm
add user · switch user
devices mem reboot shutdown

[kyron]:~# ls
projects    docs    welcome.txt

[kyron]:~#

Get a feel for the OS.

No desktop environment hiding the fundamentals. KyronOS boots into a VGA terminal and gives you a simple shell to interact with the system.

01

Boot

GRUB Multiboot2 gets the system running from an ISO on x86 PCs.

02

Shell

Navigate directories, create and edit files, inspect memory and devices, manage users, and control the machine.

03

Explore

Experiment with a RAM-backed filesystem prototype and the foundations of KyronOS itself.

What is already there

The project is intentionally close to the metal. These are the pieces currently forming the foundation.

⌁

VGA console

Scrolling, cursor tracking, keyboard input, Shift handling and Tab completion.

⌂

User homes

Users have home directories under /home, with ~ available in the shell prompt.

▦

KSFS foundations

KSFS superblock validation and a generic block-device interface are in place.

Releases

Downloadable KyronOS builds live on GitHub. The buttons below always point at the repository's release pages, so this page does not go stale when a new version ships.

Latest KyronOS release GITHUB
Release notes, ISO assets, checksums and older versions.
Latest release ↗ All releases

Try it yourself.

Build the ISO locally, then run it in VirtualBox. The project also supports EFI mode.

$ ./setup.sh
$ make iso
$ make run

Generated image
build/kyronos.iso

For EFI in VirtualBox: make run EFI=on. See the repository documentation for build requirements and platform details.

Build documentation ↗ Roadmap KSFS

Built from the ground up.

KyronOS is an ongoing systems project. Storage controllers, partition discovery, persistent installation, and a complete on-disk filesystem tree are still part of the road ahead.

Follow development on GitHub ↗