Prepare OpenBSD installation from Live Linux

[farsotm42]

Is that possible to prepare OpenBSD installation, without using USB, ISO, but from Live Linux, with gparted tools?

The result will be like Windows WIM images apply image, the next boot, you just complete the installation.

[farsotm42]

Maybe this is better tool to prepare for installation?
https://fuguita.org/

[jggimi]

Hello, and welcome!

OpenBSD's installation can be customized with install.site(5) files, and installation can be automated with autoinstall(8) scripts. Both of these mechanisms are available through the provided RAMDISK kernels and, if one is not already running OpenBSD, via various installation media including booting from network servers rather than attached media. Boot mechanisms vary by architecture and are documented in the INSTALL.<arch> files included with the installation media and filesets.

What is it you wish to accomplish through a non-standard, unsupported approach?

[J65nko]

You can use a live Linux CD to make a partition for OpenBSD to use. Then you boot an OpenBSD installation disk to install OpenBSD in that partition.
What style of partition do you want to use? MBR or GPT?