I am trying to write a really simple script to install postfix. my script begins like this :

#!/bin/sh

echo "this is a script tp install postfix for virtual domains "

apt-get install postfix-mysql

apt-get install mutt

apt-get install telnet

apt get install mysql-common mysql-client mysql-server libmysqlclient15-dev sysv-rc-conf

apt-get instal openssl

apt-get install libsasl2 libsasl2-modules libsasl2-modules-sql libauthen-sasl-cyrus-perl libauthen-sasl-perl

apt-get install courier-base courier-authlib-mysql courier-ssl courier-pop

sysv-rc-conf --level 235 mysqld on

sysv-rc-conf --level 235 postfix on

apt-get install apache2

apt-get install vim ..... and so on

but as soon as the scipt executes it tries to install postfix-mysql , the apt-get progam asks the question " Do you want to continue [Y/n]? "

i have to keep pressing " y " ...... what do i put in my script that will automate this , without asking me the question " Do you want to continue [Y/n]?"

Thanks for all the help!!