通过crontab执行python脚本

Question

what happens to my script in python that does not run through crontab every minute. My script has execute permissions and then calls two other scripts in python.

This is the content of my crontab (#crontab -l):
*/1 * * * * /usr/bin/rsm/samplesMonitor.py

Thank you guys.

Answer 1

Check /var/log/syslog for errors.

DIAGNOSTICS
       cron requires that each entry in a crontab end in a 
       newline character. If the last entry in a crontab is 
       missing a newline (ie, terminated by  EOF),  cron  will 
       consider the crontab (at least partially) broken. A 
       warning will be written to syslog.

---

Update: According to your log message, the script is running but returning an error code. Cron will email you the output, if you have a mail agent installed.

Try either:

1. install a mail agent, such as: apt-get install exim4

2. change your cron line to log to file, like so:

    * * * * * /usr/bin/rsm/samplesMonitor.py 2>&1 >> /tmp/script.log 

---

Update 2: I re-read your question and it acurred to me that maybe you are running into python import issues. You say that your script calls two other scripts. My suggestion would be to test running your script from / . Python has a default behavior to find imports in the current working directory, so make sure your script can run from any path location.

In the crontab, you can set the starting working directory by calling your script from within another shell process. For example:

bash -c "cd THE_WORKING_DIR;/usr/bin/rsm/samplesMonitor.py"

Answer 2

我相信应该是*/1 ，而不是*\\1 。

Answer 3

It should be */1 instead of *\\1 (forward slash instead of backslash). Also, make sure the path is correct; there usually are no subdirectories under /usr/bin.

Answer 4

如果您希望它每分钟运行一次，请执行此操作

* * * * * /usr/bin/rsm/samplesMonitor.py