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