1: add this to a /etc/apt/sources.list.d/koha.list file:
   deb http://debian.koha-community.org/koha squeeze main

2. wget -O- http://debian.koha-community.org/koha/gpg.asc | sudo apt-key add -

3: add in /etc/apt/sources.list:
   deb ftp://ftp.debian.org/debian/ squeeze main
   dev-src ftp://ftp.debian.org/debian/ squeeze main

4. apt-get update

5. apt-get install koha-common

6: Did apt-get install mysql-server

7: a2enmod rewrite

8: /etc/init.d/apache2 restart

9: koha-create --create-db aridlib

10. koha-mysql instancename < databasedump.sql and koha-rebuild-zebra -f instancename

11: add Listen 8080 in apache config

11. a2dissite default