a、crontab -e衡招，添加如下內(nèi)容：
*/1 * * * * sh && echo "dd" >> /logs/cron-cc.log
*/1 * * * * sleep 30 && echo "cc" >> /logs/cron-cc.log
b、重啟crond
systemctl reload crond
systemctl restart crond
service crond reload
c阔馋、查看當(dāng)前用戶定時(shí)任務(wù)
crontab -l
d玛荞、通過日志查看是否生效
tail -f /logs/cron-cc.log
