You're in a backyard. Here are some of my own writings and collaborations.

Kernelin käätäminen Debianissa
Compiling linux kernel, a pdf written in Finnish

Lighty.info
The whole directory about Lighttpd webserver and including programming with lua.

MySQL Yleisimmät komennot
Quick reference of basic commands with a MySQL database, written in Finnish.

PostgreSQL Yleisimmät komennot
Quick reference of basic commands with a PostgreSQL database, written in Finnish.

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Further reading
Essays   by Paul Graham of Y Combinator
Hacker News   by Y Combinator, frequently checking
How To Become A Hacker   by Eric Steven Raymond