The Linux Documentation Project is the most official source of things like HowTo documents. The NewZealandLinuxMirrors page lists some TLDP mirrors; DunLug run one.
The Linux Documentation Project is working on developing free, high quality documentation for the GNU/Linux operating system. The overall goal of the LDP is to collaborate in all of the issues of Linux documentation. This includes the creation of "HowTos" and "Guides". We hope to establish a system of documentation for Linux that will be easy to use and search. This includes the integration of the manual pages, info docs, HOWTOs, and other documents.
LDP's goal is to create the canonical set of free Linux documentation. While online (and downloadable) documentation can be frequently updated in order to stay on top of the many changes in the Linux world, we also like to see the same docs included on CDs and printed in books.
The LDP is essentially a loose team of volunteers with minimal central organization. Anyone who would like to help is welcome to join in this effort. We feel that working together informally and discussing projects on our mailing lists is the best way to go. When we disagree on things, we try to reason with each other until we reach an informed consensus.
The LDP does not maintain all the manual pages, in particular they do not maintain manual pages for non-standardised user commands. Standardised user commands must compily with the with the standard and so can be maintained centrally, but most commands are non-standardised and it's very important that the manual pages reflect the command. For this reason, such manual pages are maintained and distributed alongside the commands.