setup linux for run VirtualBox to run Windows 7

gistfile1.txt

PC is Dell Optiplex 7050
- Two HDDs use as software raid
- System must use gpt, and also boot from EFI
- Debian Linux as base system
- Runing VirtualBox
- Windows-7 for ASRS as guest on VirtualBox
- Win7 should start automatically after system up,
  so user won't confused with linux

- choose lightdm as DM

- VirtualBox use version 6.1 since Win7 ova created by 6.0


# Linux installation
1. using non-free firmware netinstall iso
2. manual installed
3. create disk partitions
	/dev/sda
		sda1	100MB	EFI System
		sda2	8GB	Linux Raid
		sda3	460GB	Linux Raid
	/dev/sdb
		sdb1	100MB	EFI System
		sdb2	8GB	Linux Raid
		sdb3	460GB	Linux Raid

4. raid setup
	/dev/md0 - raid1 -- sda2, sdb2 use as swap
	/dev/md1 - raid1 -- sda2, sdb2 use as /

5. create normal user, set password, add to group gdm, sudo

7. create 'kiosk' user
	groupadd -r autologin
	useradd -m kiosk -s /bin/bash -c "Kiosk user"
	gpasswd -a kiosk autologin

8. install lightdm
9. download and install virtualbox-6.1
	wget .../virtualbox-6.1_6.1.0-135406~Debian~stretch_amd64.deb
	wget .../Oracle_VM_VirtualBox_Extension_Pack-6.1.0.vbox-extpack

	dpkg -i virtualbox...deb
# it will failed, since dependency is not met, fixed by 'apt --fix-broken install'
	apt --fix-broken install
# also virtualbox will need necessary package to build kernel modules
	apt-get install linux-header-amd64 linux-headers-`uname -r`-amd64
	apt-get install build-essential

	usermod -a -G vboxusers kiosk

# and also other essentail packages
	apt-get install xterm openssh-server vim tmux sudo htop lsof strace
	apt-get install x11-xserver-utils # for xrandr

10. fix network configuration, and /etc/apt/sources.list if necessary
	/etc/network/interfaces.d/enp0s31f6
		auto enp0s31f6
		iface enp0s31f6 dhcp
	/etc/apt/sources.list

11. modified PATH in /etc/profiles
	PATH=/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin:.

12. modififed /etc/lightdm/lightdm.conf for kiosk user to autologin
	[Seat:*]
	autologin-userr=kiosk
	autologin-session=lightdm-xsession
	display-setup-script=/usr/local/bin/lightdm-set-resolution.sh

13. There was some conflict with Win-7 guest resolution, and linux X-windows
    detected resolution, the only one that matches both was 1152x864, so
    this script /usr/local/bin/lightdm-set-resolution.sh are used to fix
    the problem with losing some desktop space.

	#!/bin/sh
	# use 'xrandr -q' to get available mode
	xrandr --output HDMI-1 --primary --mode 1152x864

14. import windows 7 ova
	sudo -u kiosk -c "VBoxManage import oot07-pc.ova"

15. install extension pack for VirtualBox
	VBoxManage list extpacks
	VBoxManage extpack install Oracle_VM_V...-extpack

16. modified to make VirtualBox not to show logo
	VBoxManage modifyvm oot07-pc --bioslogodisplaytime 1
# that is 1 ms, 0 ms won't work!

17. modified kiosk's .xsessionrc
	VBoxSDL --startvm oot07-pc --fullscreen
	sudo /sbin/shutdown -h now

18. modified /etc/default/grub to hide grub menu at boot
	GRUB_DEFAULT=0
	GRUB_TIMEOUT=1
	GRUB_TIMEOUT_STYLE=hidden
	GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
	GRUB_CMDLINE_LINUX=""
	GRUB_HIDDEN_TIMEOUT=0
	GRUB_HIDDEN_TIMEOUT_QUIET=true
	GRUB_DISALBE_OS_PROBER=true
	GRUB_RECORDFAIL_TIMEOUT=0