在linux可以使用df命令查看硬盘的使用情况：

root@vsp1:/# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            313765552  98574148 199253292  34% /
udev                     10240       132     10108   2% /dev
none                   4078220         0   4078220   0% /dev/shm
none                   4078220        32   4078188   1% /var/run
none                   4078220         0   4078220   0% /var/lock
none                   4078220         0   4078220   0% /lib/init/rw