Because the standard input and the standard output of the remote command are tied to your keyboard and display, albeit through the magic of SSH.
这是因为远程命令的标准输入和标准输出都绑定到了您的键盘和显示器，这正是SSH的神奇之处。
Reads the command input from a file, instead of reading input from the keyboard.
从文件中读取输入的命令，而不是从键盘输入。
Reads the command input from a file, instead of reading input from the keyboard.
从文件中读取输入的命令，而不是从键盘输入。
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