[CentOS] cat cron jobs into crontab

Florin Andrei florin at andrei.myip.org
Tue Mar 13 18:25:02 UTC 2007

Karl R. Balsmeier wrote:
> What's the best/safest way to "cat" the following job into crontab?
> */3 * * * *  /usr/lib64/nagios/plugins/check_megaraid_passive.sh > 
> /dev/null 2>&1
> I am used to doing this manually via crontab -e, but now I simply have 
> too many centos servers to build in a given week (get to toss another 
> 120K at some more 2U chenbro/tyan/amd64's -w000ooo).

crontab (and the files in /var/spool/cron) are for manual updates to the 
scheduled jobs.
For automated updates, the "official" way is /etc/cron.d

So, if you want to automate the creation/removal of cron jobs, just 
create/remove files in /etc/cron.d
crontab and the associated files are NOT the appropriate tool for that 

Just create a file called /etc/cron.d/nagios-megaraid containing the 
line you specified.

Florin Andrei


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