每分钟只在特定时间运行cron作业？ [英] Run a cron job every minute only on specific hours?

问题描述

如何在特定时间内每分钟运行cron作业？像这样：

How do you run a cron job every minute only on specific hours? Like so:

它将只检查从上午11点到上午12点，下午4点到下午5点以及晚上9点到晚上10点的每分钟

It will only check every minute from 11AM to 12AM, 4PM to 5PM and 9PM to 10PM

对我来说似乎很复杂，我不知道从哪里开始。

It seems to be complicated to me I don't know where to start.

推荐答案

正确的解决方案：

* 11,16,21 * * *

因为如果您使用以前的解决方案：

Because if you use previous solution:

0-59 11-12,16-17,21-22 * * * *

工作将从12:40或17:59开始。

Job will start at 12:40 or 17:59. It is not in range from 11AM to 12AM, 4PM to 5PM and 9PM to 10PM.

更新：

传统（继承自Unix）cron格式包含由空格分隔的五个字段：

Traditional (inherited from Unix) cron format consists of five fields separated by white spaces:

*    *    *    *    *  command to be executed
┬    ┬    ┬    ┬    ┬
│    │    │    │    │
│    │    │    │    │
│    │    │    │    └───── day of week (0 - 6) (0 is Sunday, or use names)
│    │    │    └────────── month (1 - 12)
│    │    └─────────────── day of month (1 - 31)
│    └──────────────────── hour (0 - 23)
└───────────────────────── min (0 - 59)

nnCron 可以使用传统和增强版本的cron格式，其中有第6个字段：Year。

nnCron can use both traditional and "enhanced" version of cron format, which has an additional (6th) field: Year.

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