[CentOS] Inquiry:How to make crontab job permanent even after server reboot?

[hadi motamedi]

Thank you very much for your reply . Can you please do me favor and let me
know where I have to check for the scripts that may wipe out these files on
reboot ? How can I check if /var/spool on transient storage ?
Please be informed that I have two CentOS servers , one is running CentOS
5.0 and the other is CentOS5.2 . For the CentOS5.2 , the cron job does not
disappear after server reboot but for the 5.0 one it does . Can you please
let me know what is wrong here ?
Thank you in advance



On Wed, Oct 28, 2009 at 5:16 AM, John R Pierce <pierce at hogranch.com> wrote:

>  hadi motamedi wrote:
> > Dear All
> > Please be informed that I have an CentOS 5 server and I need it to be
> > automatically rebooted at pre-specified times . To this end , I tried
> > to set it as its crontab job as the followings :
> > #crontab -e
> > 30 15 * * * reboot
> > It got through but after the server first reboot the crontab job
> > disappeared . So I tried to set it in another way , as the followings :
> > set the cron list in /tmp/temp
> > add the following lines to /etc/rc.local :
> > crontab /tmp/temp
> > But still the crontab job will disappear after the server first reboot
> > . Can you please do me favor and let me know how can I make the
> > crontab job permanent on my CentOS server even after server reboot ?
> > Let me thank you in advance
> >
>
>
> crontab -e    /should/ be editing the file /var/spool/cron/$USER
>
> and crond reads /var/spool/cron/* to decide what to do.
>
> do you have scripts that are wiping out these files on reboot?  or is
> /var/spool on a transient (non-persistent) storage ?
>
>
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