Ubuntu developer, upstream maintainer of LXC and related container projects, long time contributor to LTSP, project leader of Edubuntu and active contributor to a bunch of other open source projects.
[ my public key: https://keybase.io/stgraber; my proof: https://keybase.io/stgraber/sigs/dHGTc6qZbmHiw_da6IdRnHUM9vUBJZu7sriEAhuWGak ]