使用python运行crontab [英] Running crontab with python

问题描述

Python crontab脚本似乎不起作用.当我手动运行它时，

Python crontab script doesnt seem to work. When i run it manually,

python /home/ec2-user/code1.py

它工作正常，但是当放入crontab的cron.txt文件时，不会.

it works fine but when put into cron.txt file for the crontab, doesnt.

我的crontab文件是:

My crontab file is:

 @hourly python /home/ec2-user/code1.py >/dev/null 2>&1

我也尝试过

0    *    *    *    * python /home/ec2-user/code1.py >/dev/null 2>&1

但是运气都不好.

sudo crontab -l
@hourly python /home/ec2-user/code1.py >/dev/null 2>&1

显示所有功能. 我试过 Crontab无法运行我的python脚本，并且对其他人也不太幸运

Shows everything functional. I tried Crontab not running my python script and couple others with not much luck either.

使用

PATH=/opt/python2.7/bin  
MAILTO=my@email
*/5 * * * * /home/ec2-user/code1.py

我收到的电子邮件是:

 /bin/sh: /home/ec2-user/code1.py : No such file or directory

但是我可以打开和编辑文件没问题.我尝试了许多不同的操作，但归结为:cron看不到该文件.

Yet I can open and edit the file no problem. I tried many different thing but it comes down to this: cron doesnt see the file.

感觉就像我经历了整个> https://askubuntu.com/questions/23009 /reasons-why-crontab-does-not work 仍然没有运气

Feels like I went through entire https://askubuntu.com/questions/23009/reasons-why-crontab-does-not-work and still no luck

推荐答案

1. 验证cron是否正在运行:ps aux | grep [c]ron应该显示正在运行的cron进程
2. 从命令中删除重定向，以便cron通过电子邮件将您的输出发送给您
3. 在您的crontab中添加MAILTO=<email address>，以便获取电子邮件
4. 在命令中放置python(/opt/python2.7/bin/python)的完整路径，而不仅仅是python
5. 向crontab添加另一个命令，例如echo FOOBAR，并验证您是否收到电子邮件.
6. ls -l /homeec2-user/code1.py?应该是/home/ec2-user/code1.py
7. 仅使用crontab -e从未从其他平台或直接编辑文件来编辑用户的crontab.
8. 运行crontab -l | cat -A，以便我们可以验证所有控制字符是否正确.

1. Verify cron is running: ps aux | grep [c]ron should show a running cron process
2. Remove the redirects from the command so that cron emails you the output
3. Add a MAILTO=<email address> to your crontab, so that you get the email
4. Put the full path to python (/opt/python2.7/bin/python) instead of just python in the command
5. Add another command to crontab such as echo FOOBAR and verify that you get the email.
6. ls -l /homeec2-user/code1.py ? Should that be /home/ec2-user/code1.py
7. Only ever edit a user's crontab with crontab -e never from another platform, or by editing the file directly.
8. Run crontab -l | cat -A so that we can verify all the control characters are correct.

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