Python script does not run from crontab

Question

I have the following shell script. It checks whether the python script is running or not, and if not, it will start the python script. When I run it from command line like ./crontab.sh it works even from other places like MaskRCNN/crontab.sh. But when I put it into the crontab only the echos are working.

#!/bin/bash
out=$(ps aux | grep 'python train/train.py' | rev | cut -d ' ' -f 1| rev | wc -l)
if [ $out -eq "2" ];then
    echo "2 processes" >> /tmp/testing.txt
else
    echo "1 process" >> /tmp/testing.txt;
    cd /hdd1/Alex/testMaskRCNN_human_bodyparts/MaskRCNN_body;
    CUDA_VISIBLE_DEVICES=0 /usr/bin/python train/train.py
fi

The crontab looks like this:

* * * * * /hdd1/Alex/testMaskRCNN_human_bodyparts/MaskRCNN_body/crontab.sh

I hope there are enough details. Thank you

CUDA_VISIBLE_DEVICES=0 /usr/bin/python train/train.py is this supposed to run the script? because if it is i think the script needs to be surrounded by backticks — Nullman
– Nullman, Commented Aug 9, 2017 at 13:02

beliy · Accepted Answer · 2017-08-09 13:03:39Z

1

try change train/train.py to full path...

answered Aug 9, 2017 at 13:03

beliy

4456 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

beliy Over a year ago

try also add ` > /tmp/cron.log` for loging output

Florentin Alexandru Iftimie · Accepted Answer · 2017-08-10 15:39:04Z

I managed to debug it by adding the &>> operator.

`(/usr/bin/python /hdd1/Alex/testMaskRCNN_human_bodyparts/MaskRCNN_body/train/train.py &>> /tmp/testing.txt)`

And I found out that it missed an export:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/cuda/lib64/

Final script:

#!/bin/bash
out=$(ps aux | grep '/usr/bin/python /hdd1/Alex/testMaskRCNN_human_bodyparts/MaskRCNN_body/train/train.py' | rev | cut -d ' ' -f 1 | rev | wc -l)
if [ $out -eq "2" ];then
    echo "2 processes" >> /tmp/testing.txt
else
    echo "1 process" >> /tmp/testing.txt
    export CUDA_VISIBLE_DEVICES=0
    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/cuda/lib64/
    `(/usr/bin/python /hdd1/Alex/testMaskRCNN_human_bodyparts/MaskRCNN_body/train/train.py &>> /tmp/testing.txt)`
fi

Collectives™ on Stack Overflow

Python script does not run from crontab

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related