Some years ago I tried disk-less setups where the host did not have a HD and booted from the net. At that moment it was via cable with an integrated card so the Bios could use it.

Today, I have a PC laptop with some HD data that I would need to manage from inside an Ubuntu acting as a recovery system. I don't want to open the hardware to extract the disk.

So the natural options should be either boot a recovery ubuntu from a CD or from a pen-drive.

But, hey, we are at 2020, not 2005!!! Time elapses.

Booting from CD-ROM seems very obsolete those days, and pen-drives start to seem so too. The 10-year-old kids see CDs and PenDrives (both for data and music) as "an old device" as 20-years-old youths saw diskettes for data cassettes and vinyls for music 10 years ago.

The laptop has an integrated cable-ETH (which I think I never used) and an integrated WiFi.

Question

I wonder if there's any easy way to combine the "disk-less setup" with "Wi-Fi" and with a "live ubuntu" so I can enter in the laptop's BIOS, tell "hey you, boot from X" and boom! done! have the laptop to boot a diskless recovery ubuntu from the WiFi instead of from a CD or PenDrive.

I barely remember how it was... but I think in the 2000's the disk-less setup was a combination of a t-ftp server (I think it was a ip-less ftp server or something like this) and nfs.

NOTE: I control the LAN, I can setup a server in the LAN if needed. I can also use linux and windows tools and/or start docker containers to act as the t-ftp if needed.

Any "standardized" diskless ubuntu boot in 2020?