1.执行mount命令查看/system目录对应挂载分区

/dev/block/system on /system type ext4 (ro,seclabel,relatime,data=ordered)

2. Android 6.0以下mount system目录

mount -o remount /system

3. Android 7.1 - Android 8.1  mount system目录:

mount -o remount,rw -t ext4 /dev/block/system /system

4. Android 9.0 mount system目录

mount -o remount,rw -t ext4 /dev/root

5.  Android 9.0 mount vendor目录

mount -o rw,remount /vendor