Why everytime i do a sudo apt-get install build-essential dpkg-dev fakeroot debhelper libgdbm-dev libldap2-dev libpcre3-dev libssl-dev libsasl2-dev postgresql-server-dev-8.2 po-debconf dpatch libmysqlclient15-dev lsb-release libcdb-dev libdb-dev


IN the end i get this:

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package postgresql-server-dev-8.2


It always says it could find that package, i believe this is exactly why i screwed up squirrel mail last time. and before that i had done the following below and completed successfully.

sudo apt-get install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl postfix-tls libsasl2-2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl phpmyadmin apache2 libapache2-mod-php5 php5 php5-mysql libpam-smbpass