df -h|df -H 的具体差别 ？？

[echo_no_bug]

-H "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to
three or less using base 10 for sizes.

-h "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to
three or less using base 2 for sizes.

重要的是base 2 for sizes.什么意思呢.才刚接触unix～～～

z＊＊＊deMacBook-Pro:pingan z＊＊＊$ df -H /
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk0s2 120G 113G 7.0G 95% 27701191 1711177 94% /
z＊＊＊deMacBook-Pro:pingan z＊＊＊$ df -h /
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk0s2 112Gi 105Gi 6.5Gi 95% 27701193 1711175 94% /

[ckc]

一个是1024为计数单位，一个是1000计数单位

[starym]

正解，一个是10进制10^3计算大小，一个是2进制2^10计算大小。