I am trying to add a python script to crontab with following lines:
0 * * * * /pathtoexecutable/file.py
0 0 1 * 1 /pathtoexecutable/file2.py
Files are executable python scripts.
file.py further initiates around 15 subprocesses, which store info in a MySQL database.
file2.py gets, obviously, executed though through crontab as well.
For some reason file.py isn't working via crontab, but if I run it through command line it works.
1) Catch the output & errors of yours scripts :.
0 * * * * /pathtoexecutable/file.py &>> /path/some/log.txt
0 0 1 * 1 /pathtoexecutable/file2.py &>> /path/some/log2.txt
2) Be sure that every python file begins with a shebang : #! /usr/bin/env python
3) Be sure too that every python file has a exec mode (chmod +x file.py)
Related
This is my crontab.
SHELL=/bin/bash
PATH=/home1/<user>/.pyenv/shims:/home1/<user>/.pyenv/bin:/usr/lib64/qt-3.3/bin:/usr/nhnkrb5/bin:/usr/bin:/bin:/usr/X11R6/bin:/home1/<user>/.local/bin:/home1/<user>/bin
HOME=/home1/<user>
# Do something
0 1 * * * /home1/<user>/.pyenv/shims/python /home1/<user>/folder/myscript.py >> /home1/<user>/folder/$(date "+%Y.%m.%d-%H.%M.%S").log 2>&1
It runs perfectly from the terminal no matter where I execute it from. I have tried every answer on this page, and my cron doesn't return any errors.
https://askubuntu.com/questions/23009/why-crontab-scripts-are-not-working
I have also checked that my $PATH the cron runs from is identical to the one in my bash. Checked using * * * * * env > /tmp/env.txt
Please tell me what am I doing wrong.
It is better to add the python header at line 1 to your main script. For example if your main script file is app.py then it's content can be following:
!#/home1/<user>/.pyenv/shims/python
# Here goes your Python Script.
and then
$ chmod +x app.py
Now you can add
# Do something
0 1 * * * /home1/<user>/folder/myscript.py >> /home1/<user>/folder/$(date "+%Y.%m.%d-%H.%M.%S").log 2>&1
I ran into the same problem, script working when I am running manually but didn't work with crontab. This method worked.
I currently have a python script at
/home/ubuntu/test/test.py
When this script runs, it writes to a file
/home/ubuntu/test/test.txt
I am completely new to cron, and not very familiar with linux in general. I am trying to set up a cronjob that basically runs this script every minute.
I saw some people suggest #!/usr/bin/env python so I added it, but I noticed I don't even have a env folder in /usr/bin
I then ran chmod -x test.py. Then added an entry to cron * * * * * /home/ubuntu/test/test.py. Noted this wasn't working and saw someone suggest trying * * * * * /home/ubuntu/test/test.py 2>&1 /tmp/testlog.log. But when I check /tmp i only see a folder crontab.8Rxowt/crontab/cron and i don't see any log file created.
I am kind of confused now, I can't figure out why nothing is being updated at all. I'm not sure if the script being run needs to be placed somewhere specific, or if I screwed something up with my cron installation, or something else altogether.
I noticed trying to run ./test.py gives permission denied, and sudo ./test.py gives command not found. Is my shebang not working? I verified im using unix line endings.
To make it run every minute you have to add the path to python from your system:
* * * * * /usr/bin/python cd /path_to/test.py
I suggest you to test it with a simple command such as "touch"
* * * * * /usr/bin/touch cd /path_to/test.txt
https://crontab.guru/every-1-minute
I am trying to get a Python script to run hourly using crontab however I cannot seem to get it to work.
The Python program runs fine and completes if I manually run it from terminal.
$ python /home/pi/Documents/Project/Base_Prog.py
My crontab is setup like so:
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow command
#reboot /usr/bin/python /home/pi/Documents/Project/Base_Prog.py
0 * * * * /usr/bin/python /home/pi/Documents/Project/Base_Prog.py
0 * * * * /usr/bin/python /home/pi/Documents/SimpleCronTest.py
Let me clarify though, I followed suggestions on this similar post. I tried the simple test script that creates an output file and that worked. However under the same crontab with the same settings, my program doesn't complete.
The interesting point is that using TOP when the script is due to start, the Python window briefly pops up before disappearing again. So I assume cron is at least sort of working.
I have added the:
#!/usr/bin/env
Python line to the top of the Base_Prog.py file.
My Python program is an API scraper that finds its inputs from one file and writes the results to another, all files in the project directory have full write permissions using chmod 777.
I am at a loss as to what is causing this.
UPDATE
The output log for both the simple test and my programme in the syslog is:
Apr 2 14:29:01 raspberrypi CRON[1455]: (pi) CMD (python /home/pi/Documents/Project/Base_Prog.py)
Apr 2 14:29:01 raspberrypi CRON[1456]: (pi) CMD (python /home/pi/Documents/CronTest.py)
I think full solution is:
First add a SHEBANG line on top of your python script:
#!/usr/bin/env python
Make your script executable with chmod +x
If your script work with stdout or if you need to know what's wrong:
0 * * * * /usr/bin/python /home/pi/Documents/Project/Base_Prog.py >> tmp.log
And just to clarify:
0 * * * * -means the cron will run always when the minutes are 0 (hourly)
You need to see the output of the cron execution for any clues, not just running it from terminal. Perhaps there are some permission/ownership errors or something along those lines. From the cron execution, you can send output to a file to view:
0 * * * * python /home/pi/Documents/Project/Base_Prog.py 1> /dev/null 2> /home/pi/Documents/Project/Base_Prog.err
and you can view /home/pi/Documents/Project/Base_Prog.err after for clues. Or you can also have it emailed to you:
0 * * * * python /home/pi/Documents/Project/Base_Prog.py 1> /dev/null 2>&1 | mail -s "Base Program Output" you#company.com
I have an ubuntu box I'm trying to setup a cronjob for. When I do crontab -e this is what I am using as the instructions. I need it run every 11 minutes.
0/11 * * * * python /path/to/file/foo.py
At the top of the python script I have put:
#!/usr/bin/python
And I have done:
sudo chmod a+x foo.py
I'm not really sure how I am supposed to figure out how it ran correctly. The script works fine on my local, and appends something to a text file. I have been checking the txt file and nothing appears. Any suggestions?
The cron line
0/11 * * * * python /path/to/file/foo.py
will fire only when the minutes equals 0. To make it fire every 11 minutes use
*/11 * * * * python /path/to/file/foo.py
It might be very simple question, but how could I run a python script on my fedora dist every 2 days?
Thanks
Antonis
It is a question on cron.
First is add a SHEBANG line on top of your python script.
#!/usr/bin/env python
Make your script executable with chmod +x
And do a crontab -e and add 0 0 */2 * * /path/to/your/pythonscript.py