文章介绍：解决云上dd成vyos的虚拟机硬盘只有2G，磁盘容易占满，不能下载存储文件的问题，需要扩容磁盘。
一、查看当前磁盘
lsblk
二、调整分区大小
2.1、切换root权限
sudo -i
2.2、调整分区
sudo fdisk /dev/vda
输出应类似于：
Disk /dev/vda: 40 GiB, ...
...
Device Boot Start End Sectors Size Id Type
/dev/vda1 * 2048 4194303 4192256 2G 83 Linux
2.3、删除现有分区
Command (m for help): d
2.4、创建新分区
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-83886079, default 2048): 2048
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-83886079, default 83886079): <press Enter>
2.5、保留现有文件系统的签名
Do you want to remove the signature? [Y]es/[N]o: N
2.6、写入更改并退出
Command (m for help): w
2.7、扩展文件系统
sudo resize2fs /dev/vda1
2.8、验证结果
df -h
示例输出：
Filesystem Size Used Avail Use% Mounted on
udev 976M 0 976M 0% /dev
tmpfs 199M 1.3M 198M 1% /run
/dev/vda1 40G 1.9G 38G 5% /usr/lib/live/mount/persistence
/dev/loop0 386M 386M 0 100% /usr/lib/live/mount/rootfs/1.5-rolling-202408060021.squashfs
tmpfs 993M 0 993M 0% /usr/lib/live/mount/overlay
overlay 40G 1.9G 38G 5% /
tmpfs 993M 84K 993M 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 993M 0 993M 0% /tmp
tmpfs 993M 256K 993M 1% /var/tmp
none 993M 0 993M 0% /etc/cni/net.d
none 993M 44K 993M 1% /opt/vyatta/config
tmpfs 199M 0 199M 0% /run/user/1003
三、查看当前磁盘
lsblk
