The first example, written in PHP, will capture the output of the shell command "df -h," place the output into an array, and then examine each line of output against a regular expression.
采用PHP编写的第一个示例将捕获Shell命令“df—h”的输出，将输出放在一个数组中，然后根据一个正则表达式检查输出的每一行。
This output is very different from the previous — flagged — version, because it is just the unfiltered results of df -h with a print statement injected at the top.
此输出与前面带标记的版本区别非常大，因为它只是使用顶部注入的print语句来打印的未经筛选的df—h命令结果。
Df -h also shows how the disk was partitioned.
df - h还会显示磁盘的分区情况。
For example, run the command df -h to display an inventory of free disk space on your "UNIX" machine.
例如，可以运行df - h命令显示“UNIX”机器上的空闲磁盘空间。
(the ls and df commands also support -h for human-readable format.) Because pv now expects a specific number of bytes to transit through the pipe, it can render a true progress bar.
(ls和df命令也支持通过- h产生人可读的格式)。
(the ls and df commands also support -h for human-readable format.) Because pv now expects a specific number of bytes to transit through the pipe, it can render a true progress bar.
(ls和df命令也支持通过- h产生人可读的格式)。
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