su
gparted /dev/sda
fdisk /dev/sda

Disk /dev/sda: 40 GiB, 42949672960 bytes, 83886080 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x17f5438f

Device     Boot Start      End  Sectors Size Id Type
/dev/sda1  *     2048 83886079 83884032  40G 83 Linux

mkfs.ext4 /dev/sda1
mkdir /mnt/tmp
mkdir /mnt/cdrom
mount /dev/sda1 /mnt/tmp
mount /dev/sr0 /mnt/tmp
cd /
cp -r --preserve=all {bin,home,lib64,srv,var,etc,lib,opt,root,sbin,usr} /mnt/tmp
cd /mnt/tmp
mkdir {dev,mnt,proc,run,tmp,boot,boot/grub,media,sys}

cp /mnt/cdrom/linux/boot/vmlinuz /mnt/tmp/boot


cat > /mnt/tmp/boot/grub/grub.cfg << "EOF"
# Begin /boot/grub/grub.cfg
set default=0
set timeout=5

insmod ext2
set root=(hd0,1)

menuentry "Umvirt Linux From Scratch 0.1" {
                insmod gzio
                insmod part_msdos
        linux   /boot/vmlinuz root=/dev/sda1 rootfstype=ext4 ro 
}
EOF

cat > /mnt/tmp/etc/fstab << "EOF"
# Begin /etc/fstab

# file system  mount-point  type     options             dump  fsck
#                                                              order
/dev/sda1     /            ext4    defaults            1     1
#/dev/sda2     swap         swap     pri=1               0     0

# End /etc/fstab
EOF

grub-install --boot-directory=/mnt/tmp/boot /dev/sda

echo "ulfs-desktop" > /mnt/tmp/etc/hostname 

umount /dev/sda 

qemu-img -hda /dev/sda -m 512