cront计时任务每秒执行一次

#!/bin/bash
step=1 #间隔的秒数，不能大于60
for (( i = 0; i < 60; i=(i+step) )); do
$(/bin/sh '/root/acb.sh')
sleep $step
done
exit 0

crontab -e   

* * * * * /bin/sh /root/ccc.sh