commands:
sed -i "s#squeeze#wheezy#g" /etc/apt/sources.list.d/debian.list /etc/apt/sources.list.d/security.list &&
+ rm -f /etc/apt/preferences.d/dsa-bacula-client &&
+ if [ -e /etc/apt/preferences.d/buildd ]; then
+ rm -f /etc/apt/preferences.d/buildd &&
+ sed -i "s#squeeze#wheezy#g" /etc/apt/sources.list.d/buildd.debian.org.list
+ fi &&
apt-get update &&
apt-get install dpkg apt samhain &&
service samhain stop &&