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So, you are interested in contributing to the GNU Hurd project?

Welcome!  Every single contribution is very much encouraged!

There are various ways of contributing, read on about contributing to...

[[!toc levels=3]]


# Documentation

## These Web Pages

Please read about [[how_to_contribute_to_these_web_pages|web_pages]].


# The System Itself

There are essential two kinds of Hurd system designs.

<a name="hurd_on_mach"> </a>
## Hurd on Mach

For one there's the implementation of the *[[Hurd]] running on the
[[microkernel/mach/GNU_Mach]] microkernel*.  This is what is commonly
meant when people are talking about GNU/Hurd systems.

This system has mostly been designed and implemented
[[in_the_'90s|hurd/history]].  It works and is usable.
For example, these web pages are rendered on a [GNU/Hurd
system](http://www.bddebian.com/cgi-bin/uptime).

You can try it out for yourself: for getting access, installing
[[Debian_GNU/Hurd|hurd/running/debian]] will probably be the easiest and most
feature-complete solution.  If you don't have spare hardware to use for doing
so, you can also get a
[[shell_account_on_a_public_Hurd_machine|public_hurd_boxen]].  Depending on the
things you're going to work on (and on your internet connection), this may be
an easy way of getting used to Hurd systems.  Installing in a virtual machine
is another possibility, see the page about
[[running_a_Hurd_system|hurd/running]] for the full story.

Then you can either play around and eventually strive to do something
useful or -- if you want -- [[ask_us|contact_us]] to assign something to you, depending
on the skills you have and the resources you intend to invest.

Please spend some time with thinking about the items in this [[questionnaire]].

Before you can significantly contribute, take some time to learn about the
system, e.g., [[microkernels_for_beginners|microkernel/for_beginners]].  Until
you can do the basic exercises listed there, you won't be able to significantly
contribute to the Hurd.

For more reading resources, please see these web pages, for example,
[[Hurd_documentation|hurd/documentation]] and
[[Mach_documentation|microkernel/mach/documentation]] for links to a bunch of
documents.

### Porting Packages

Debian is currently the Hurd distribution of choice among Hurd users and
developers.

Here is a
[[list_of_Debian_packages_that_need_porting|hurd/running/debian/porting]].

You can also just [[install_Debian_GNU/Hurd|hurd/running/debian]] and find what
doesn't work or suit you and try to improve that.

### Open Issues: GNU Hurd

Here is a [[list_of_open_issues|hurd/open_issues]] for the [[GNU_Hurd|hurd]].

### Open Issues: GNU Mach

Here is a [[list_of_open_issues|microkernel/mach/gnu_mach/open_issues]] for
[[microkernel/mach/GNU_Mach]].

### Open Issues: GNU MIG

Here is a [[list_of_open_issues|microkernel/mach/mig/gnu_mig/open_issues]] for
[[microkernel/mach/mig/GNU_MIG]].


<a name="hurd_on_modern_microkernel"> </a>
## Hurd on a modern microkernel

Developers [[have_identified|hurd/critique]] a number of problem with the *Hurd on
Mach* system.  Problems, that can not easily be fixed by bug-fixing the
existing code base, but which require design changes -- deep going ones
actually.

As such systems (as the desired one) are not in common use, but are -- if at
all -- research projects, this new *Hurd on a modern microkernel* project
itself is more a research project than a *sit down and implement/code/hack*
project.

If you're interested in contributing in this area, knowing the *Hurd on Mach*
system nevertheless is a prerequisite.  At least have a deep look at the
documentation pointers given in the previous section.  Also read through the
[[HurdNG|hurd/ng]] section.

Please send email to the [[mailing_lists/l4-hurd]] mailing list for discussing
this post-Mach system design.