+Approx - Debian package proxy/cacher howto
+
+% apt-get install approx
+% echo 'debian http://ftp.de.debian.org/debian' >>/etc/approx/approx.conf
+% Restart approx
+
+Add your new approx to sources.list
+
+eg.
+deb http://localhost:9999/debian unstable main contrib non-free
+
+use approx in grml-debootstrap like:
+% grml-debootstrap -r lenny -t /dev/sda1 -m http://127.0.0.1:9999/debian
+--
+Simple webserver with python:
+
+% python -m SimpleHTTPServer
+--
+Upgrade only packages from the grml-stable Debian repository:
+
+echo 'deb http://deb.grml.org/ grml-stable main' > /etc/apt/grml-stable.list
+apt-get -o Dir::Etc::sourcelist=/etc/apt/grml-stable.list -o Dir::Etc::sourceparts=/doesnotexist update
+apt-get upgrade
+--