Sys

http://www.freedos.org/download/download/FD12CD.iso
 - sys, freedos, latest release installer
http://archive.is/paKgW
 - sys, japheth's site (andreas grech) back up from before his 2012 departure from the scene
http://sourceforge.net/projects/hx-dos/files/2.17/
 - sys, simplistic win32 emulation for freedos
http://mirrors.kernel.org/debian/pool/main/
 - sys, debian's current packages are here
http://archive.debian.org/debian/pool/main/
 - sys, debian (old versions) packages and installers
http://wiki.xen.org/wiki/VTd_HowTo
 - sys, docs for xen exokernel's hardware virtualization method
http://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF
 - sys, kvm video passthrough instructions
http://www.kernel.org/pub/linux/kernel/
 - sys, the linux kernel available in source format for your use
http://cdimage.debian.org/debian-cd/current/amd64/iso-cd/
 - sys, the current debian-installer cd.iso disc image
http://sourceforge.net/projects/grub4dos/files/GRUB4DOS/grub4dos%200.4.4/
 - sys, gnu grub, a version that runs on a clean dos boot and can boot an OS.
http://www.linux.com/news/how-launch-windows-binaries-linux-directly
 - sys, an explanation of binfmt_misc.ko for linux, and how to use it with wine32 and dosbox
http://acpica.org/node/178
 - sys, advanced configuration and power interface, a standard for new (smp 64-bit intel/amd) machines' hardware
http://www.japheth.de
 - sys, japheth is back online this year!
http://cdimage.debian.org/cdimage/ports/hurd-i386/current/
 - sys, the gnu hurd distribution installer, a non-linux microkernel free software environment
http://cdimage.debian.org/cdimage/ports/hurd-i386/current/iso-dvd/debian-hurd-2019-i386-DVD-1.iso
 - sys, the gnu hurd 2019 release installer dvd
http://d-i.debian.org/daily-images/amd64/20200825-00:20/hd-media/boot.img.gz
 - sys, debian installer for usb media

retrocomputing video links:
 - https://www.youtube.com/watch?v=ylXdJl6-y90
   explanation: "Installing Tandy XENIX From REAL 8-Inch Floppy Disks: I install Tandy XENIX 3.01 on my TRS-80 Model 16B using the original 8-inch floppy diskettes from the 1980s, while referencing the original documentation binders included with that release.  I'll walk you through the installation process from low-level formatting of the hard disk (DREM), file system initialization, installation, and finally, som..."