如何指示cron每两周执行一次工作? [英] How to instruct cron to execute a job every second week?

问题描述

我想通过 cron 运行一项作业，该作业将在每天的第二个星期二在给定时间执行.因为每个星期二都很容易:

I would like to run a job through cron that will be executed every second Tuesday at given time of day. For every Tuesday is easy:

0 6 * * Tue

但是如何在每个第二个星期二"(或者，如果您愿意 - 每两周一次)做到这一点?我不想在自己的脚本中实现任何逻辑，而是只在 cron 中保留定义.

But how to make it on "every second Tuesday" (or if you prefer - every second week)? I would not like to implement any logic in the script it self, but keep the definition only in cron.

推荐答案

怎么样，它确实将它保存在 crontab 中，即使它没有在前五个字段中精确定义:

How about this, it does keep it in the crontab even if it isn't exactly defined in the first five fields:

0 6 * * Tue expr `date +\%W` \% 2 > /dev/null || /scripts/fortnightly.sh

这篇关于如何指示cron每两周执行一次工作?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！