I removed the entries in crontab for root and still, I can see the scripts running tail -f /var/log/cron.

How can I remove those entries.

Output of cron log:

CROND[2736]: (root) CMD (/home/centos/aws-scripts-mon/mon-put-instance-data.pl --mem-avail --mem-used --swap-util --swap-used --from-cron)

Nov 26 06:57:01 CROND[2738]: (root) CMD (/opt/aws-scripts-mon/jvm_stat.sh)

  • In addition to a personal crontab (crontab -e) there are also the system crontab /etc/crontab, files in /etc/cron.d/ with a cron snippet or an executable (script) in the a /etc/cron.[hourly |daily |weekly |monthly] directory as possible places for root to schedule jobs.... – HBruijn Nov 26 '18 at 8:58

After editing a crontab file, and saving it, verify that the system log says something like :

"crontab.yciBZ6/crontab" 24L, 1887C written crontab: installing new crontab

If not, just restart crond using sudo systemctl reload crond.service

And if you have processes already running started by cron, you might need to kill them as well.

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