bash 在命令行上获取当前年份

Get the current year on the commandline

提问by Uli K?hler

Using wget, I need to download a file whose URL contains the year. How can I embed the current 4-digit year (at the time of running the command, e.g. 2015)? For example, what would the command currentyearbe in

使用 wget，我需要下载一个 URL 包含年份的文件。如何嵌入当前的 4 位数年份（在运行命令时，例如 2015）？例如，命令currentyear是什么

wget "http://example.com/data-$(currentyear).txt"

What would be the corresponding command if I'd need the two-digit year (e.g. 15 for 2015)?

如果我需要两位数的年份（例如 2015 年为 15），相应的命令是什么？

回答by Uli K?hler

You can simply use the datecommand as date +%Y:

您可以简单地将date命令用作date +%Y：

wget "http://example.com/data-$(date +%Y).txt"

If you need the 2-digit year, you can simply use date +%y.

如果您需要 2 位数年份，您可以简单地使用date +%y.