脚本：随机出现个数

内容来源：哈哈-->http://chenxizhuimeng.blog.51cto.com 

1)随机出现一个
#！/bin/bash
grep=（zhangping liubinbin maofang wangning dongyahui fanxingqiang wangjun yaohaiyang wangbo）
C=$[$RANDOM%9]
echo ${grep[$C]}

2)随机出现两个 
#！/bin/bash
grep=（zhangping liubinbin maofang wangning dongyahui fanxingqiang wangjun yaohaiyang wangbo）
A=$[$RANDOM%9]
B=$[$RANDOM%9]
    while [ $A -ge $B ] ; do
     B=$[$RANDOM%9]
     done
 
  echo "${grep[$A]},${grep[$B]}"

3)融合：随机出现一个、两个到多个
 vim test.sh
#!/bin/bash
  grep=(zhangping liubinbin maofang wangning dongyahui fanxingqiang wangjun yaohaiyang wangbo)
    flag=(0 0 0 0 0 0 0 0 0)
  A() {
         let T=1
         while [ ! $T -eq 0 ]
        do
          B=$[$RANDOM%9]
          if [  ${flag[$B]} -eq 0 ];then
            echo "${grep[$B]}"
            flag[$B]=$[${flag[$B]}+1]
            T=0
          fi
         done
  }
  while getopts ":n:" SWITCH; do
     case $SWITCH in
         n) let I=$OPTARG
            if [ $I -lt 10 -a $I -gt 0 ];then
                while [ $I -gt 0 ] 
            do
            A

               I=$[$I-1]
             done
           else
                  echo "Please input a right number(1-8)." && exit 1
          fi ;;

         \?)echo "Please input :`basename $0` -n number(1-9)" && exit 1;;
 
           esac
           done

chmod u+x test.sh
./test.sh -n 1  (随机出现一个）
./test.sh -n 2  (随机出现两个)
./test.sh -n 3  (随机出现三个)
......
./test.sh -n 8  (随机出现8个)