shell多个脚本怎么并发执行

#!bin/bash

 

PRONUM=10               #进程个数

 

tmpfile="$$.fifo"        #临时生成管道文件

mkfifo $tmpfile

exec 6<>$tmpfile

rm $tmpfile

 

for(( i=0; i<$PRONUM; i++ ))

do

        echo "init."

done >&6

 

for(( i = 0; i < ${count}; i++ ))

do

        read line

        #echo $line

        {

                commands

                echo "line${i} finished."

        } >&6 &

done <&6

 

wait

• sh a.sh  & 
  sh b.sh  & 
  sh c.sh &