先用fdisk重新分割
Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 has been deleted.
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): *Enter*
Using default response p.
Partition number (2-4, default 2): *Enter*
First sector (1026048-854745087, default 1026048): *Enter*
Last sector, +sectors or +size{K,M,G,T,P} (1026048-854745087, default 854745087):
*Enter*
最後輸入命令w重開機
然後使用resize2fs /dev/mmcblk0p2
以上