#deb http://ftp.debian.org/debian squeeze main contrib non-free
#deb-src http://ftp.debian.org/debian squeeze main contrib non-free
deb http://ftp.debian.org/debian wheezy main contrib non-free
deb-src http://ftp.debian.org/debian wheezy main contrib non-free
#deb http://security.debian.org/ squeeze/updates main
#deb-src http://security.debian.org/ squeeze/updates main
deb http://security.debian.org/ wheezy/updates main
deb-src http://security.debian.org/ wheezy/updates main
apt-get update
aptitude install apt dpkg aptitude
aptitude full-upgrade
reboot
apt-get update && apt-get upgrade
reboot
cat /etc/debian_version
apt-get update && apt-get upgrade