語法：df -h
顯示結果
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Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 493G 922M 472G 1% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 1.9G 8.0K 1.9G 1% /dev
tmpfs 377M 328K 377M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 1.9G 0 1.9G 0% /run/shm
none 100M 0 100M 0% /run/user