在SD卡和eMMC上扩展分区

登录Debian后，为充分利用SD卡上未使用的空间，请执行以下步骤，扩展昉·星光 2SD卡和eMMC的分区：

1. 执行以下命令，列出可使用的磁盘空间：

   ~# df -h

   输出示例：

   Filesystem Size Used Avail Use% Mounted on
   udev 3.7G 0 3.7G 0% /dev
   tmpfs 793M 3.1M 790M 1% /run
   /dev/mmcblk1p4 2.0G 1.9G 88M 96% /
   tmpfs 3.9G 0 3.9G 0% /dev/shm
   tmpfs 5.0M 12K 5.0M 1% /run/lock
   tmpfs 793M 32K 793M 1% /run/user/107
   tmpfs 793M 24K 793M 1% /run/user/0

2. 以磁盘名作为参数运行fdisk命令。
   示例命令：

   root@starfive:~# fdisk /dev/mmcblk<X>

   提示： <X>：变量值为0或1。SD卡取1，eMMC取0。

   示例输出：

   root@starfive:~# fdisk /dev/mmcblk1
   Welcome to fdisk (util-linux 2.38.1).
   Changes will remain in memory only, until you decide to write them.
   Be careful before using the write command.
   GPT PMBR size mismatch (4505599 != 62929919) will be corrected by 
    write.
   This disk is currently in use - repartitioning is probably a bad idea.
   It's recommended to umount all file systems, and swapoff all swap
   partitions on this disk. 
   Command (m for help): d
   Partition number (1-4, default 4): 4
   Partition 4 has been deleted.
   Command (m for help): n
   Partition number (4-128, default 4): 4
   First sector (34-62929886, default 221184):
   Last sector, +/-sectors or +/-size{K,M,G,T,P} (221184-62929886, default 
    62928895):
   Created a new partition 4 of type 'Linux filesystem' and of size 29.9 
    GiB.
   Partition #4 contains a ext4 signature.
   Do you want to remove the signature? [Y]es/[N]o: N
   Command (m for help): w
   The partition table has been altered.
   Syncing disks.

3. 执行resize2fs命令调整/dev/mmcblk<X>p4分区的大小，以充分利用未使用的块。
   提示： <X>：变量值为0或1。SD卡取1，eMMC取0。

   示例命令和输出：

   root@starfive:~# resize2fs /dev/mmcblk1p4
   resize2fs 1.46.6-rc1 (12-Sep-2022)
   Filesystem at /d[ 295.372617] EXT4-fs (mmcblk1p4): resizing filesystem 
    from 535291 to 7838464 blocks
   ev/mmcblk1p4 is mounted on /; on-line resizing required
   old_desc_blocks = 1, new_desc_blocks = 4
   [ 295.993163] EXT4-fs (mmcblk1p4): resized filesystem to 7838464
   The filesystem on /dev/mmcblk1p4 is now 7838464 (4k) blocks long.

   验证：

   执行df -h命令以验证分区的新大小，并验证扩展分区（/dev/mmcblk<X>p4）的步骤是否成功。

   提示： <X>：变量值为0或1。SD卡取1，eMMC取0。

   以下输出表示修改成功：

   root@starfive:~# df -h
   Filesystem Size Used Avail Use% Mounted on
   udev 3.7G 0 3.7G 0% /dev
   tmpfs 793M 3.1M 790M 1% /run
   /dev/mmcblk1p4 30G 1.9G 28G 7% /
   tmpfs 3.9G 0 3.9G 0% /dev/shm
   tmpfs 5.0M 12K 5.0M 1% /run/lock
   tmpfs 793M 32K 793M 1% /run/user/107
   tmpfs 793M 24K 793M 1% /run/user/0