これでいいのかな

gistfile1.sh

#!/bin/bash

if test $USER = root; then
	mount -o rw, remount /system
	cp migu-1c-regular.ttf /system/fonts
	cp migu-1c-bold.ttf /system/fonts
	//mv DroidSans.ttf sans_org.ttf
	//mv DroidSans-Bold.ttf sans_bold_org.ttf
	rm DroidSans.ttf
	rm DroidSans-Bold.ttf
	mv DroidSansFallback.ttf fallback_org.ttf
	mv DroidSansMono.ttf mono_org.ttf
	ln -s migu-1c-regular.ttf DroidSans.ttf
	ln -s migu-1c-regular.ttf DroidSansFallback.ttf
	ln -s migu-1c-regular.ttf DroidSansMono.ttf
	ln -s migu-1c-bold.ttf DroidSans-Bold.ttf
else
	echo Operation not permitted.
	exit 1
fi