Linux/Unix Shell Scripting - Error de Sintaxis Scrip Linux

random ()

	{

	#Sets the length of the password the script will generate

	MAXSIZE=12

	password=""

	# Holds valid password characters. I choose alpha-numeric + the shift-number keyboard keys

	array1{

	w e r t y u p a s d f h j k z x c v b m Q W E R T Y U P A D

	F H J K L Z X C V B N M 1 2 3 4 5 6 7 8 9 @ % _

	}

	# Used in conjunction with modulus to keep random numbers in range of the array size

	MODNUM=${#array1[*]}

	# Keeps track of the number characters in the password we have generated

	pwd_len=0

        while [ $pwd_len -lt $MAXSIZE ]

	do

	  index=$(($RANDOM%$MODNUM))

	  password="${password}${array1[$index]}"

	  ((pwd_len++))

	done

#	echo $password

	return 0

	}

#!/bin/bash

pwd_len=0

MAXSIZE=12

while [ $pwd_len -lt $MAXSIZE ]

do

    echo $pwd_len

    let pwd_len=$pwd_len+1

done

#!/bin/sh

pwd_len=0

MAXSIZE=12

while [ $pwd_len -lt $MAXSIZE ]

do

    echo $pwd_len

    pwd_len=$((pwd_len+1))

done