Clear
clear 命令执行预期操作，它清除屏幕，重置提示符到左上角。
The clear command does what you would expect and clears the screen, resetting the prompt
in the top left corner.
clear 命令执行预期操作，它清除屏幕，重置提示符到左上角。
The clear command does what you would expect and clears the screen, resetting the prompt
in the top left corner.