Linux Crontab Shell脚本实现秒级定时任务的方法

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

# m h dom mon dow command 
* * * * * /home/www/php/crontab/crontab.sh

 * * * * * /webservice/crontab/inviteFriend.sh

#!/bin/bash
step=2 #间隔的秒数，不能大于60 

for (( i = 0; i < 60; i=(i+step) )); do
 #$(php \'/home/php/crontab/tolog.php\') 
 curl -I http://******.com/InviteFriends/sendInviteFriendCoupon
 sleep $step
done
exit 0