Yes, those pages plus the per-platform pages, which are all listed under http://www.mediawiki.org/wiki/Manual:Installation_guide#System-specific_instructions
The problem is: the install/upgrade docs were never updated after the new installer was written. That, and the docs were ancient and scattered anyway (most of the stuff on the platform-specific pages is just forks of the primary install doc and not actually platform-specific at all).
Would anybody be willing to be a mentor for this documentation task for Google Code-in? If yes, could you add it to
Sunday (we can still improve the description until December 1st)?
If time is spare I can also do that - I just need a statement who
would mentor it.
See https://lists.wikimedia.org/pipermail/wikitech-l/2014-October/079264.html for more information. Don't hesitate to ask if you have questions!