英文:
Crontab run every 3 months starting from July
问题
当我尝试让我的 crontab 每隔3个月从七月开始运行作业时,我使用了这个表达式 15 11 11 7/3 *
,然后我收到了以下错误信息:crontab: installing new crontab "/tmp/crontab.vM7zCi":3: bad month errors in crontab file, can't install.
我尝试在网上阅读如何做这个,这应该是正确的吗?
英文:
When i tried to make my crontab to run a job every 3 months starting from July i use this expression 15 11 11 7/3 *
I then get this error.
crontab: installing new crontab
"/tmp/crontab.vM7zCi":3: bad month
errors in crontab file, can't install.
Ive tried reading online how to do this and this should be right?
答案1
得分: 1
如果你使用 */3
,你的任务将在每个是3的倍数的月份运行(第3、6、9和12个月)。
通常,你可以通过结合一个范围后跟 /3
来指定你想要的内容,例如 1-12/3
—— 但月份或星期几字段不允许使用范围。引用 Vixie cron 的 crontab(5)
手册页,这是最常见的实现:
也可以使用名称来表示“月份”和“星期几”字段。
使用特定日或月的前三个字母(大小写不敏感)。不允许使用名称的范围或列表。
但是数字列表是允许的。因为你只想指定4个月,所以列出它们即可:
15 11 11 1,4,7,10 * 你的命令在这里
英文:
If you used */3
, your job would run in every month that's a multiple of 3 (months 3, 6, 9, and 12).
Normally you could specify what you want by combining a range followed by /3
, e.g. 1-12/3
-- but ranges are not allowed for the month or day-of-week fields. Quoting the crontab(5)
man page for Vixie cron, the most common implementation:
> Names can also be used for the "month" and "day of week" fields.
> Use the first three letters of the particular day or month (case
> doesn't matter). Ranges or lists of names are not allowed.
But numeric lists are allowed. Since there are only 4 months you want to specify, just list them all:
15 11 11 1,4,7,10 * your-command-here
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库,让每个人都能够通过互相帮助和分享经验来进步。
评论