umount /dev/sda2
fdisk /dev/sda2
mkfs.ext4 /dev/sda2
mkswap /dev/sda3
mkdir -p /mnt
mount -t ext4 /dev/sda2 /mnt
mkdir /mnt/home
mkdir /mnt/var
mkdir /mnt/proc
mkdir /mnt/dev
mkdir /mnt/sys
mkdir /mnt/boot
mkdir /mnt/tmp
tar xvjpf stage3-*.tar.bz2 -C /mnt
tar xvjf portage-*.tar.bz2 -C /mnt
for i in dev proc sys tmp; do mount -o bind /$i /mnt/mychroot/$i; done
cp /etc/resolv.conf /mnt/mychroot/etc
chroot /mnt/mychroot /bin/bash
env-update
source /etc/profile
emerge --sync