Installation

Update your package repository: sudo pacman -Syu
Install some packages: sudo pacman -S virtualbox virtualbox-guest-iso, Enter a number: 2 (virtual-host-modules-arch).
To use the USB ports of your host machine, add the current user to the vboxusers users group: sudo gpasswd -a $USER vboxusers
```
user@pc:~$ groups $USER # Check that your user is in the vboxusers group.
  wheel autologin vboxusers nmaximo7  
```
Load the VirtualBox module automatically at boot time: sudo modprobe vboxdrv
Maybe you find the following problem: The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Try to install: sudo pacman -S virtualbox-host-dkms linux-headers

Install the VirtualBox Oracle VM Virtual Extension Pack.

user@pc:~$ vboxmanage -v | cut -dr -f1 # Verify your version of VirtualBox
  7.0.14_
wget https://download.virtualbox.org/virtualbox/7.0.14/Oracle_VM_VirtualBox_Extension_Pack-7.0.14.vbox-extpack # Download the Extension Pack with the same version
sudo vboxmanage extpack install Oracle_VM_VirtualBox_Extension_Pack-7.0.14.vbox-extpack # Install the VirtualBox Extension pack

The Oracle VM VirtualBox web service, vboxwebsrv, is used for controlling Oracle VM VirtualBox remotely. Enable vboxweb to start on boot and start the service: sudo systemctl enable vboxweb.service, sudo systemctl start vboxweb.service

Create a Virtual Machine

Start VirtualBox.
Click New in the VirtualBox Manager Windows: Name of the VM (myArch); Folder is the location where this virtual machine will be stored on your computer, e.g., /run/media/nmaximo7/mydisk2/VirtualMachines; ISO Download an Ubuntu or Arch’s ISO, click the folder icon, and select the .iso file you have just downloaded; Type is the Operating System, e.g., Linux; and Version, e.g., Arch Linux (64 bits.)
Memory size is the amount of RAM you want to allocate to the virtual machine. You would normally want to give approximately half of your RAM to the Virtual Machine.
Next, you must specify a Virtual Hard Disk. Typically, you will select Create a virtual hard disk now. Disk Size. Use the slider to select a maximum size for the hard disk in the new VM.

Run your Virtual Machine with XOrg

Select the VM’s entry in the VirtualBox Manager list, and click Start at the top of the windows.
Install the operating system. We will use the Arch Linux installer: archinstall.
Add new drives to a VirtualBox virtual machine: Power down the VM, Settings, Storage, click Controller: SATA, Add Hard Disk.
Partition the disk: sudo fdisk /dev/sdb. Press g: create a new GPT (a new GUID Partition Table), then n so we can create a new partition, and finally w to write the changes and exit.
Create a ext4 filesystem on the new filesystem: sudo mkfs.ext4 /dev/sdb1.

Mount the disk.

	sudo mkdir /mnt/mydisk/ # Create a mount point.
	blkid # Identify the drives and their partitions.
	sudo nvim /etc/fstab: UUID=X /mnt/mydisk ext4 defaults 0 1
	sudo chown -R nmaximo7:nmaximo7 /mnt/mydisk # It recursively change the ownership of all files and directories under `/mnt/mydisk` to the user and group `nmaximo7`; the `-R` option applies the change recursively.
	sudo mount -a # Read the /etc/fstab configuration file and mount all entries in `/etc/fstab`.
	systemctl daemon-reload # Reload the systemd daemon to apply the changes.

A login manager is a program that grabs control of the X display and manages logins. We don’t need it, we will install a display server (Xorg), a display server initialization (xinit), a traditional window manager (i3), a status bar (i3bar) with these packages and other extras (minimalistic to a point): sudo pacman -S git vim alacritty xorg xorg-xinit i3-wm i3status i3blocks neofetch firefox.
To start the Xorg display server, we’ll use the startx program provided by the xorg-xinit package. Its configuration file xinitrc is in /etc/X11/xinit/, so we copy it as a starting point: cp /etc/X11/xinit/xinitrc ~/.xinitrc, and remove the code at its bottom related to the tab window manager (twm &, a window manager for the X Windows System), a clock (clock -geometry 50x50-1+1 &), and a few instances of xterm (a default X terminal emulator) with the executable of our i3 windows manager
```
# At the bottom of the default xinitrc
# Credits: ejmastnak.com, Install and start Xorg
twm &
xclock -geometry 50x50-1+1 &
xterm -geometry 80x50+494+51 &
xterm -geometry 80x20+494-0 &
exec xterm -geometry 80x66+0+0 -name login
```
We replace it by
```
# At the bottom of the default xinitrc
exec i3
```

Recover your password

It is already in our article Troubleshooting. How to fix your Linux

Backup

Install Timeshift: yay -S timeshift or sudo pacman -Sy timeshift.
Execute timeshift: sudo timeshift-gtk. Snapshot Location: sdb1. SnapShot Level: daily (1) -yes, it is a virtual machine, and I am not rich 😃; and press Create.
Destroy: rm -rf /*
Reboot from the iso.
Create a mount point (sudo mkdir /mnt/arch/), identify where Arch is installed (lsblk), and mount the arch linux partition -the root /- (sudo mount /dev/sda2 /mnt/arch).
Mount the external disk: sudo mkdir /mnt/external, sudo mount /dev/sdb1 /mnt/external.
List all the available snapshots and choose the one you want to restore, e.g., ls /mnt/external/timeshift/snapshots. Restore your system: timeshift ‐-restore ‐-snapshot “YYYYMMDD-HHMMSS”; where ‐-restore specifies that you want to restore a snapshot; ‐-snapshot “YYYYMMDD-HHMMSS”; is used to specify the snapshot you want to restore. The timestamp format is Year-Month-Day-Hour-Minute-Second.

You can make it easy without needing to mount anything just typing: timeshift ‐-restore ‐ or sudo timeshift-gtk, then select your backup device (e.g., /dev/sdb1 -1-). Having a separate backup disk for critical data is a good precaution against accidentally erasing something or a system crash.