I couldn't cope with all the "LOL WOODSCREWS!!!1!" type trolling. There's a lot of partisan stuff, and meme-spewing. And while there are plenty of people who really know what they're talking about (to the level the OP wants and above) there are also arrogant but ignorant 14 year olds ranting stuff.
The text /prog/ board has some interesting discussion, but there's a lot of "Have you read your SICP today?".
And both those boards have some deeply NSFW content.
Some of the other chans are better, but still risky and with a lot less traffic.
There is a great bit of copypasta about installing Linux though.
>And both those boards have some deeply NSFW content.
Rarely, /g/ is supposed to be SFW.
>there are plenty of people who really know what they're talking about
This is why I recommend it; a while back some guys were discussing how to build the low level functions of an OS.