随机8位密码

写着玩，呵呵

PASSWD ()
{
###########################################################
#This function is to generate8 random password.
###########################################################
letter="a b c d e f g h i j k l m n o p q r s t o v w x y z"
capital="A B C D E F G H I J K L M N O P Q R S T O V W X Y Z"
character="! @ # $ % ^ & _  , . - ( ) { } [ ] < > ? / ~"
number="0 1 2 3 4 5 6 7 8 9"
sum="a A f n"
a=($letter)
A=($capital)
f=($character)
n=($number)
#s=($sum)
nub_a=${#a[*]}
nub_A=${#A[*]}
nub_f=${#f[*]}
nub_n=${#n[*]}
#nub_s=${#s[*]}
#x=${s[$((RANDOM%${nub_s}))]}
wp1=${A[$((RANDOM%${nub_A}))]}
wp2=${a[$((RANDOM%${nub_a}))]}
wp3=${n[$((RANDOM%${nub_n}))]}
wp4=${f[$((RANDOM%${nub_f}))]}
#wp5_8=${$x[$((RANDOM%${nub_$x}))]}
wp5_8=$(($((RANDOM%9000))+1000))
Passwd=$wp1$wp2$wp3$wp4$wp5_8
echo "$Passwd"

}