linux shell并发执行脚本

#!/bin/bash
QUEUE_NUM=10 #设置并发数
temp_fifo_file=/tmp/"$$".fifo
mkfifo "$temp_fifo_file"
exec 9<>"$temp_fifo_file"
for((i=1;i<=${QUEUE_NUM};i++));do
        echo 1 1>&9
done


##子进程工作内容
Worker(){
local name=$1
echo  "$name is working"
sleep 2
}



for i in `echo {1..50}`;do
	read -u9
	(	
		Worker $i
                echo 1 1>&9
	)&
done
wait

rm -f $temp_fifo_file
exec 9>&-
exec 9<&-