Installation

Download, verify, flash, and boot an InstantOS image.

1. Download

Grab an image from the downloads page. Every image has a .sha256 sibling.

2. Verify

sha256sum -c instantos-x86_64.iso.sha256

Only proceed if verification passes.

3. Flash

Write the image to a USB stick (replace /dev/sdX with your device — this erases it):

sudo dd if=instantos-x86_64.iso of=/dev/sdX bs=4M status=progress conv=fsync

Or use a graphical tool like balenaEtcher.

4. Boot

InstantOS boots via UEFI. Enter your firmware boot menu and select the USB device. Legacy/BIOS boot is not supported.

Next: the syscall ABI.