How to set a cron job to run at a exact time?

Question

I have a cron job that runs once a day. But I would like to make it run at midnight or other time exactly.

Answer 1

You can also specify the exact values for each gr

0 2,10,12,14,16,18,20 * * *

It stands for 2h00, 10h00, 12h00 and so on, till 20h00.

From the above answer, we have:

The comma, ",", means "and". If you are confused by the above line, remember that spaces are the field separators, not commas.

And from (Wikipedia page):

*    *    *    *    *  command to be executed ┬    ┬    ┬    ┬    ┬ │    │    │    │    │ │    │    │    │    │ │    │    │    │    └───── day of week (0 - 7) (0 or 7 are Sunday, or use names) │    │    │    └────────── month (1 - 12) │    │    └─────────────── day of month (1 - 31) │    └──────────────────── hour (0 - 23) └───────────────────────── min (0 - 59) 

Hope it helps :)

--

EDIT:

• don't miss the 1st 0 (zero) and the following space: it means "the minute zero", you can also set it to 15 (the 15th minute) or expressions like */15 (every minute divisible by 15, i.e. 0,15,30)

Answer 2

check out

http://www.thesitewizard.com/general/set-cron-job.shtml

for the specifics of setting your crontab directives.

 45 10 * * * 

will run in the 10th hour, 45th minute of every day.

for midnight... maybe

 0 0 * * *