This technique is useful to give yourself a reminder based on a coming date, perhaps in a script or shell startup file, like so.

这个技巧非常有用，它可以根据将来的日期为自己设置提醒，可能是在脚本或Shell启动文件中，如下所示。

youdao

Then, run the command input line -- this can be several lines strung together with shell directives -- and finally, get the date again on the same input line.

然后，运行该命令输入行（可能是由 Shell 指令串联起来的几行内容），最后可以使用相同的输入行再次得到日期。

youdao

Suppose, for example, that you need to know the date two weeks hence. If you're at a shell prompt, you can get the answer immediately.

例如，您需要了解两星期以后的日期。

youdao