仅在特定时间每分钟运行一次 cron 作业?
您如何仅在特定时间每分钟运行一次 cron 作业?像这样:
How do you run a cron job every minute only on specific hours? Like so:
它只会在上午 11 点到中午 12 点、下午 4 点到下午 5 点和晚上 9 点到晚上 10 点每分钟检查一次
It will only check every minute from 11AM to 12AM, 4PM to 5PM and 9PM to 10PM
这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 * * * *
作业将在 12:40 或 17:59 开始.不在上午 11 点到 12 点、下午 4 点到 5 点和晚上 9 点到 10 点的范围内.
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 格式由五个由空格分隔的字段组成:
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，它有一个额外的(第 6 个)字段:年份.
nnCron can use both traditional and "enhanced" version of cron format, which has an additional (6th) field: Year.
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