2013-05-22 Linux
First step is to be sure that your Squeeze is up to date:
apt-get update && apt-get upgrade
Next step is to have proper entries in sources.list file. Edit file by typing:
gedit /etc/apt/sources.list
and replace the whole content with:
deb http://ftp.pl.debian.org/debian wheezy main contrib non-free deb-src http://ftp.pl.debian.org/debian wheezy main contrib non-free deb http://ftp.pl.debian.org/debian wheezy-updates main contrib non-free deb http://ftp.pl.debian.org/debian-security wheezy/updates main contrib non-free
You can change country code to a different one if needed. I’ve used servers from Poland. Now update sources:
apt-get update
Than upgrade packages:
apt-get upgrade
As the final step we upgrade the whole distribution:
apt-get dist-upgrade