怎么只有4.4G磁盘
Filesystem Size Used Avail Use% Mounted on
udev 966M 0 966M 0% /dev
tmpfs 199M 564K 199M 1% /run
/dev/vda1 4.4G 2.3G 1.9G 55% /
tmpfs 994M 0 994M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 994M 0 994M 0% /sys/fs/cgroup
tmpfs 199M 0 199M 0% /run/user/0