请教相关的crontab问题

shizier

系统版本为:
HP-UX  B.11.00 U

设置的crontab命令如下:
# crontab -l
10 3,8,10,15,21 * * * su - sq -c "cd /bell/sq/sqcheck;./sqcheck.sh" > /dev/null 2>/dev/null

但是为什么到执行时会产生两条命令?红色的命令为什么绘执行?log日志如下:
>  CMD: su - sq -c "cd /bell/sq/sqcheck;./sqcheck.sh" > /dev/null 2>/dev/null
>  root 11485 c Tue Aug 21 08:10:01 EAT 2007
>  CMD: /bell/sq/sqcheck/sqcheck.sh
>  scu 11486 c Tue Aug 21 08:10:01 EAT 2007
<  scu 11486 c Tue Aug 21 08:10:07 EAT 2007
<  root 11485 c Tue Aug 21 08:10:09 EAT 2007
>  CMD: su - sq -c "cd /bell/sq/sqcheck;./sqcheck.sh" > /dev/null 2>/dev/null
>  root 23126 c Tue Aug 21 10:10:00 EAT 2007
>  CMD: /bell/sq/sqcheck/sqcheck.sh
>  scu 23127 c Tue Aug 21 10:10:00 EAT 2007
<  scu 23127 c Tue Aug 21 10:10:05 EAT 2007
<  root 23126 c Tue Aug 21 10:10:08 EAT 2007
~

shizier

为什么没有人里我呀