ERROR: chroot: can't execute "/bin/bash" no such file or directory on Android

Hi guys,
I have a problem with "change root" command when I setup ubuntu to run on android. My tablet is Samsung galaxy tab 3 10.1, android 4.4.2 . I followed this tutorial step by step: galaxytabhacks.com/galaxy-tab-10-1-hacks/how-to-install-ubuntu-linux-on-galaxy-tab-10-1-tabuntu(excuse me, I can't post link, please copy and paste help me) but when I run "bootubuntu" script it threw error as title above.
This is bootubuntu script

Code:

---

#modprobe ext2
mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
export kit=/sdcard/ubuntu
export bin=/system/bin
if [ ! -d /data/local/ubuntu ]
then
mkdir /data/local/ubuntu
fi
export mnt=/data/local/ubuntu
export PATH=$bin:/usr/bin:/usr/sbin:/bin:$PATH
export TERM=linux
export HOME=/root

export bbox=/system/xbin/busybox
$bbox mknod /dev/block/loop255 b 7 255

$bbox losetup /dev/block/loop255 /sdcard/ubuntu/ubuntu.img
$bbox mount -t ext2 /dev/block/loop255 /data/local/ubuntu



$bbox mount -t devpts devpts $mnt/dev/pts
$bbox mount -t proc proc $mnt/proc
$bbox mount -t sysfs sysfs $mnt/sys
sysctl -w net.ipv4.ip_forward=1
echo "Setting /etc/resolv.conf to Google Open DNS 8.8.8.8 and 8.8.4.4"
echo "nameserver 8.8.8.8" > $mnt/etc/resolv.conf
echo "nameserver 8.8.4.4" >> $mnt/etc/resolv.conf
echo "Setting localhost on /etc/hosts "
echo "127.0.0.1 localhost" > $mnt/etc/hosts
echo "READY TO ROCK AND ROLL BABY! "
echo "Brought to you by NexusOneHacks.net and the open source community! "
echo " "

chroot $mnt /bin/bash  #error here
#After exit command is executed clear it all up
echo " "

echo "Shutting down Ubuntu"
$bbox umount $mnt/dev/pts
$bbox umount $mnt/proc
$bbox umount $mnt/sys
$bbox umount $mnt
$bbox losetup -d /dev/block/loop255 &> /dev/null

---

And this is result

Code:

---

Ubuntu Chroot Bootloader v0.1
Ubuntu Bootloader is now installed!
This process does NOT damage Android OS!

Original Installer by Charan Singh
Modified for Ubuntu Chroot by Max Lee at AndroLinux.com ,G2Hacks.com and NexusOneHacks.net

To enter the Ubuntu Linux console just type 'bootubuntu'
root@santos10wifi:/sdcard/ubuntu # bootubuntu
net.ipv4.ip_forward = 1
Setting /etc/resolv.conf to Google Open DNS 8.8.8.8 and 8.8.4.4
Setting localhost on /etc/hosts
READY TO ROCK AND ROLL BABY!
Brought to you by NexusOneHacks.net and the open source community!

chroot: can't execute '/bin/bash': No such file or directory

Shutting down Ubuntu
1|root@santos10wifi:/sdcard/ubuntu #

---

I read lot of thread about this error, but it on ubuntu only so I can't solve it.
Can anyone help me? Thanks so much!