Ubuntu Contributions

Many Ubuntu developers are also prolific free software developers and contribute to other projects, notably to [http://www.debian.org/ Debian].

Upstart

http://upstart.ubuntu.com

Jockey

https://launchpad.net/jockey

Brainstorm

https://launchpad.net/ubuntu-qa-website

LTSP5

https://launchpad.net/~ltsp-upstream

Package management

• The [:PackageDependencyFieldBreaks:dpkg Breaks field] was implemented by Ian Jackson for Ubuntu.

• [http://lists.debian.org/debian-dpkg/2007/04/msg00076.html dpkg triggers] were implemented by Ian Jackson for Ubuntu.

• Ubuntu developed a simplified front-end to apt called gnome-app-install (originally written by Ross Burton, but then developed for some years by Michael Vogt of Ubuntu).

Installation

Ubuntu developers have made a number of important contributions to debian-installer:

• debootstrap progress via debconf, and a good deal of what became the first-stage task installer glue
• base-installer kernel selection refactoring and test suite
• much of udev support and devfs path removal
• pcmciautils support
• chunks of debconf maintenance effort such as the progresscancel and escape capabilities
• reserved username checks
• some of rescue mode
• translation handling work in cdebconf that saved about 20MB of run-time memory

In addition, we developed a custom graphical installer, [https://launchpad.net/ubiquity Ubiquity], which uses debian-installer for many of its back-end tasks.

OpenSSH

• [http://www.debian.org/security/2008/dsa-1576 Host and user key blacklisting support], mitigating the [http://www.debian.org/security/2008/dsa-1571 OpenSSL RNG vulnerability]

• [https://bugzilla.mindrot.org/show_bug.cgi?id=1450 ConsoleKit support]

initramfs-tools

initramfs-tools was originally written by Jeff Bailey for Ubuntu, and later became Debian's default initramfs system.

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