1. masuk ke terminal(bukan terminal pasar minggu ya :-P )
  2. nano /etc/apt/sources.list
  3. ubah repositorynya menjadi :

deb http://kambing.ui.ac.id/debian/ squeeze main contrib non-free
deb http://kambing.ui.ac.id/debian/ squeeze-updates main contrib non-free
deb http://kambing.ui.ac.id/debian-security/ squeeze/updates main contrib non-free

update list repository : apt- get update

kalo lupa nama packagenya : apt-cache search mysql

kalo mau install (contoh mysql) : apt-get install mysql-server