mynotes cronjob

open a crontab

crontab -e

Run everyday

# every week day
0 9 * * * /home/ubuntu/novanenv/bin/python /path/to/your/script.py >> /path/to/your/logfile.log 2>&1
# every working day
0 9 * * 1-5 /home/ubuntu/novanenv/bin/python /path/to/your/script.py >> /path/to/your/logfile.log 2>&1
# weekly once on monday
0 9 * * 1 /home/ubuntu/novanenv/bin/python /path/to/your/script.py >> /path/to/your/logfile.log 2>&1

Position	Name	Value Range	Description
1st	Minute	0-59	Specific minute. 0 = Top of the hour. 30 = Half past. * = Every single minute.
2nd	Hour	0-23	24-hour format. 0 = Midnight. 9 = 9 AM. 13 = 1 PM. 23 = 11 PM.
3rd	Day of Month	1-31	Specific Calendar Date. Use this if you want to run on the "1st of the month" or "15th of the month".
4th	Month	1-12	The Month. Use this to run only in "December" or "January".
5th	Day of Week	0-6	The Weekly Cycle. 0 or 7 = Sunday 1 = Monday 5 = Friday

once cronjob changes are done, restart the cron

sudo systemctl status cron
sudo systemctl stop cron
sudo systemctl start cron
sudo systemctl restart cron

check cronjob logs

grep CRON /var/log/syslog

How to check python script status triggered by cron

# check python programs
ps aux | grep python
# check specific script
ps aux | grep my_script.py
#output will be as below
ubuntu    12345  0.5  python3 /path/to/my_script.py

This run can be killed by following

# kill by script name
pkill -f my_script.py
# kill by process id
kill 12345
# force kill
kill -9 12345