Centos Crontab not responding

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http://unix.stackexchange.com – I was learning and experimenting with crontab today. The default editor was just too difficult for me to figure out which caused me to remove my crontab by running crontab -r. Now, when I run crontab -e and input my new cron task, nothing happens. I suspect it's the crontab -r command I executed earlier. Can anyone help, please? (HowTos)