I want to run a python script on a ubuntu 14.04 server with following frequency:
Monday to Friday:
From 0800 hrs to 1600 hrs: Run once every hour
From 1600 hrs to 2300 hrs: Run once every 30 minutes
Saturday and Sunday:
From 0800 hrs to 2300 hrs: Run once every two hours
At other times, don't run
Is this possible with cron? If not, can anybody suggest some alternative?
As suggested in the comments, adding these cron entries will do:
(Lines starting with # are comments)
# monday to friday, 8 am to 4 pm, once every hour
0 8-16 * * 1-5 <command>
# monday to friday, 4 pm to 10 pm, twice every hour
0,30 17-22 * * 1-5 <command>
# saturday to sunday, 8 am to 11 pm, once every hour
0 8-23 * * 0,6 <command>
Related
I have tried creating a cron expression starting at 4 pm running every 4 hrs but not sure how to start at 4:30.
Below is the expression:0 0 16/4,20,0,8,12? * * *
The following cron expression cron(0 14 ? * MON-FRI *) basically runs something 4:00 pm from Monday to Friday.
I am wondering if it is possible to modify the expression so I can run something at 4:00 am and 4:00 pm every Monday to Friday.
Use this crontab line to run command_name at 4:00 and 16:00 (4 AM and 4 PM) Monday-Friday:
0 4,16 * * 1-5 command_name
From crontab manual:
The time and date fields are:
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sunday, or use names)
Your Cron job description looks different from the general crontab. But to give you an idea of how to achieve what you're looking for:
Edit cron-table. Choose your editor.
crontab -e
Add 2 lines cron jobs.
* 4 * * 1-5 /usr/bin/...# Your command goes here 04:00 am.
* 16 * * 1-5 /usr/bin/...# Your command goes here 04:00 pm.
4PM (16:00): 0 16 * * MON-FRI
See crontab guru
"At 16:00 on every day-of-week from Monday through Friday.”
4AM &4 PM (4:00 & 16:00): 0 4,16 * * MON-FRI
See crontab guru
“At minute 0 past hour 4 and 16 on every day-of-week from Monday through Friday.”
I am trying to run a script Monday through Friday every 2 hours during working hours (9 am - 4 pm).
I tried this:
0 09-16/2 * * 1-5 /local/bin/script.sh
But now my script runs Monday through Friday from 2 AM to 8 AM. I don't see what's wrong.
Try this
0 9,11,13,15 * * 1,2,3,4,5 /local/bin/script.sh
If I creating cronjob to running for every 2:30 the command will run? (It mean, my cron will running after 90 minutes for every hours.)
the command like: 30 */2 * * * /command/xxx => that's right?
Please help?
Your cron expression 30 */2 * * * will run the command every 2 hours at 30 mins past the hour i.e.00:30, 02:30, 04:30, 06:30 and so on.
If you want to run your command at intervals of two and a half hours i.e. 00:00, 02:30, 05:00, 07:30 and so on, you need to set up two crons:
0 0-20/5 * * * runs at 0 mins past the hour, every 5 hours between 00:00 and 20:00 inclusive i.e. 00:00, 05:00, 10:00, 15:00 and 20:00
30 2-22/5 * * * runs at 30 mins past the hour, every 5 hours between 02:00 and 22:00 inclusive i.e. 02:30, 07:30, 12:30, 17:30 and 22:30
On the other hand, if you want to run your command only once every day at 02:30 use 30 2 * * *.
sudo crontab -e
and then add this:
30 2 * * * /enter/your/command
I have the following cron expression:
0 0 */30 * *
How come it still runs every 30th day of the month and not every 30 days starting from now? Having the expression:
0 0 30 * *
Yields the same run times:
2013-07-30 00:00:00
2013-08-30 00:00:00
2013-09-30 00:00:00
2013-10-30 00:00:00
2013-11-30 00:00:00
I think you might want to use at instead of cron. You can use at to schedule your script to run 30 days from now with the following:
at now +30 day /path/to/your/script
Then, just put the same line near the end of your script, to schedule it to run again 30 days later.