$ export PATH=/data/local/bin:$PATH
$ su
#rm /system/build.prop
rm failed for /system/build.prop, Read-only file system
#mount -o remount,rw /dev/block/mtdblock0 /system
# rm /system/build.prop
# cp /sdcard/build.prop /system/build.prop
cp: not found
#ls /system
app
xbin
bin
drm
fonts
framework
usr
lib
etc
lost+found
media
#