sed根据关键字注释crontab的计划任务

[root@linux06 ~]# crontab -e
*/5 * * * * /root/time_test.sh

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sed  -i '/time_test/s/^/#/g'  /var/spool/cron/root 

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[root@linux06 ~]# crontab -l
#*/5 * * * * /root/time_test.sh