[Crontab] didn't work

Hello,

Here is my crontab

# Reboot one Sunday out of 2 at 02:00
0 2 * * 0/2 /usr/bin/reboot

2017-04-16
2017-04-23
2017-04-30
and so on

I tested my crontab here, it seems to work
Http://cron.schlitt.info/index.php?c...=100&test=Test

However on my distrib linux mage�a
When I register my crontab, I have the error

Bad day-of-week
Errors in crontab file, can not install

Thank you for your help

You did not say what OS its for. cron is implemented differently on linux v.s. Std UNIX systems

I mentioned it.
This is Mageia based Mandriva

Sorry, still half asleep... I wonder if the one sunday out of 2 is understood...

What does your man crontab say about step values? Mine says

So - 0/2 wouldn't work.

And, looking again at it, that wouldn't satisfy your logics either. Day-of-week 0-7/2 would mean Sunday, Tuesday, Thursday, Saturday .

Use 0 and discriminate every other Sunday within the script.