bash一分钟到5分钟 [英] bash round minutes to 5

问题描述

我们有此字符串以干净的格式检索日期和时间.

We have this string to retrieve date and time in clean format.

 TIMESTAMP=$(date "+%Y%m%d%H%M")

是否存在一些内联代码，可用于将分钟数舍入为5. 所以如果是12:03，它将变成12:00，如果是12:49，它将变成12:45

Is there some inline code that we can use to round the minute to 5 down. So if it is 12:03 it will make it 12:00 and if it is 12:49 it will be 12:45

谢谢！

推荐答案

为此，您可以从总分钟数中减去5为模的分钟数.要打印出来:

To do this you can subtract the minutes modulo 5 from the total minutes. To print it out:

echo "$(date "+%Y%m%d%H%M") - ($(date +%M)%5)" | bc

要将其保存到变量中:

my_var=$(echo "$(date "+%Y%m%d%H%M") - ($(date +%M)%5)" | bc)

这取决于您现在保留的日期格式字符串-一串数字.

This relies on your date format string remaining as it is now - a string of numbers.

示例输出:

$ date "+%Y%m%d%H%M"
201404010701
$ echo "$(date "+%Y%m%d%H%M") - ($(date +%M)%5)" | bc
201404010700

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