Sources and Updates for Software from the Debian-based KNOPPIX live CD/DVD http://debian-knoppix.alioth.debian.org/ /etc/apt/sources.list entries: # KNOPPIX Sources deb-src http://debian-knoppix.alioth.debian.org ./ # KNOPPIX Precompiled binaries deb http://debian-knoppix.alioth.debian.org ./ After adding these lines, run apt-get update and then apt-get source <packagename>[=versionnumber] or apt-