如何将stderr重定向到cron作业中的文件 [英] How to redirect stderr to a file in a cron job

问题描述

我的crontab中有一个像这样设置的cron作业：

I've got a cron job that is set up like this in my crontab:

*/1 * * * *  sudo /home/pi/coup/sensor.py  >> /home/pi/sensorLog.txt

它将stdout放入sensorLog.txt，并生成任何stderr收到一封电子邮件。

It puts stdout into sensorLog.txt, and any stderr it generates gets put into an email.

我希望stdout和stderr都进入sensorLog.txt，所以我在 1>& 2 中添加了crontab，它应该使stderr与stdout进入同一位置。现在看起来像这样：

I want both stdout and stderr to go into sensorLog.txt, so I added 1>&2 to the crontab, which is supposed to make stderr go into the same place as stdout. It now looks like this:

*/1 * * * *  sudo /home/pi/coup/sensor.py  >> /home/pi/sensorLog.txt 1>&2

现在，stdout和stderr都得到了放入电子邮件中，没有任何内容添加到文件中。这与我要完成的任务相反。

Now, both stdout and stderr both get put into an email, and nothing gets added to the file. This is the opposite of what I am trying to accomplish.

如何同时获得stdout和stderr才能重定向到文件？

How do I get both stdout and stderr to get redirected to the file?

推荐答案

反之亦然：

*/1 * * * *  sudo /home/pi/coup/sensor.py  >> /home/pi/sensorLog.txt 2>&1

2> & 1 会将标准错误（2）重定向到标准输出（1），该输出又被重定向到您的日志文件。因此，最后，stderr和stdout都将转到您的 sensorLog.txt

2>&1 will redirect standard error (2) to standard output (1) which -in turn - was redirected to your log file. So, at the end, both stderr and stdout will go to your sensorLog.txt

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