Android system.img压制操作

[root@fc16 Downloads]# simg2img system.img system.img.ext4
[root@fc16 Downloads]# mkdir tmp
[root@fc16 Downloads]# mount -t ext4 -o loop system.img.ext4 tmp

[root@fc16 Downloads]#make_ext4fs -s -l 239M -a system system.img tmp