Install SU to system.ext4 on Linux

#!/bin/bash
#
# Install Superuser for lollipop on Linux
#
# Convert system.sin to system.ext4 from FlashTool

echo "Install busybox"
dd if=busybox of=system/xbin/busybox
chown 0.2000 system/xbin/busybox
chmod 04755 system/xbin/busybox
# Not execute binary file on Linux
# system/xbin/busybox --install -s /system/xbin

echo "Install SU binary"
dd if=su of=system/xbin/su
chown 0.0 system/xbin/su
chmod 06755 system/xbin/su
ln -s system/xbin/su system/bin/su

mkdir system/bin/.ext
chmod 0777 system/bin/.ext
dd if=su of=system/bin/.ext/.su
chown -R 0.0 system/bin/.ext
chmod 0755 system/bin/.ext/.su

dd if=su of=system/xbin/daemonsu
chown 0.0 system/xbin/daemonsu
chmod 0755 system/xbin/daemonsu

dd if=su of=system/xbin/sugote
chown 0.0 system/xbin/sugote
chmod 0755 system/xbin/sugote

dd if=system/bin/sh of=system/xbin/sugote-mksh
chown 0.0 system/xbin/sugote-mksh
chmod 0755 system/xbin/sugote-mksh

dd if=supolicy of=system/xbin/supolicy
chown 0.0 system/xbin/supolicy
chmod 0755 system/xbin/supolicy

dd if=libsupol.so of=system/lib/libsupol.so
chown 0.0 system/lib/libsupol.so
chmod 0644 system/lib/libsupol.so

echo "Install Superuser.apk"
mkdir system/app/SuperSU
dd if=Superuser.apk of=system/app/SuperSU/SuperSU.apk
chown -R 0.0 system/app/SuperSU
chmod 0755 system/app/SuperSU
chmod 0644 system/app/SuperSU/SuperSU.apk

echo "Install install-recovery.sh"
if [ -e system/bin/install-recovery.sh ]; then
    mv system/bin/install-recovery.sh system/bin/install-recovery.sh.original
fi
dd if=install-recovery.sh of=system/etc/install-recovery.sh
chown 0.0 system/etc/install-recovery.sh
chmod 0755 system/etc/install-recovery.sh
ln -s system/etc/install-recovery.sh system/bin/install-recovery.sh

echo "Remove app_process"
mv system/bin/app_process system/bin/app_process_old
ln -s system/xbin/daemonsu system/bin/app_process
mv system/bin/app_process32 system/bin/app_process32_original
ln -s system/xbin/daemonsu system/bin/app_process32
cp system/bin/app_process32_original system/bin/app_process_init
chown 0.2000 system/bin/app_process_init
chmod 0755 system/bin/app_process_init

echo "Set init.d"
mkdir system/etc/init.d
dd if=99SuperSUDaemon of=system/etc/init.d/99SuperSUDaemon
chown -R 0.0 system/etc/init.d
chmod -R 0755 system/etc/init.d

echo "Set run-parts"
echo "/system/xbin/busybox run-parts /system/etc/init.d" >> system/etc/init.qcom.post_boot.sh