使用bash产生n位的随机数。测试中为产生8位。

#!/bin/bash
# -------------------------------
# Filename:    test.sh
# Revision:    1.0
# Date:        2013-08-01
# Author:      simonzhang
# Email:       simon-zzm@163.com
# Description: 
# -------------------------------

function randnum()
{
    di=(0 1 2 3 4 5 6 7 8 9 \
        a b c d e f g h i j k l m n o p q r s t u v w x y z \
        A B C D E F G H I G K L M N O P Q R S T U V W X Y Z \
        ~ ! ^ _)
    for(( i=0; i<$1; i++))
    do
        num=$num`echo -n ${di[$RANDOM % ${#di[*]}]}`
    done
    echo $num
}

get=$(randnum 8)
echo $get

bash产生n位随机数