Shell Programming and Scripting

Hi Friends,

I need a quick help in unix scripts,

my aim is to generate random passwords like,

1. first 3 characters are alphabets or numbers
2. then one of special characters like &()/?:;+-
3. Last 4 characters are alphabets or numbers

total length will be 8.

i tried with urandom option but cant help..

Is there any one can help me on this, how to get the same ?.

Regards,
Nantha.

This is a bash example:

Code:

#!/bin/bash

alnum="0123456789abcdefjhijklmnopqrstuvwxyzABCDEFJHIJKLMNOPQRSTUVWXYZ"
punct="!@#$%^&*<>.,:;><{}[]"
len1=${#alnum}
len2=${#punct}
pwd=""
tmp=""
pun=""
for((i=0; i<8 ; i++))
do
   n=$(( $RANDOM % len1 ))
   tmp=$tmp${alnum:$n:1}
   n=$(( $RANDOM % len2 ))
   pun=$pun${punct:$n:1}
done
pwd=${tmp:0:4}${pun:0:4}${tmp:4}
echo "$pwd"

You would be far better off to find a password generator on the net.