I've found HowtoForge very helpful. Is there any other similar sites that doesn't have too old tutorials which won't work nowadays?
I find that the Ubuntu community is very active, and hence there howtos are generally quite recent.
http://ubuntuforums.org would be the direct route
but I find that just adding the word "Ubuntu" to my google search will often put those results at the top, and find exactly what I'm looking for without having to re-search their site.
I find Linux Questions very helpful.
The BEST howto I've seen so far is a one-off site for setting up a mail filtering gateway server
You can find the howto here
I've often thought that site would be a good model for what a howto site should be like.
Debian wiki is also pretty awesome. Doesn't cover everything but what it does cover, it covers it really well.
On a side note, I tend to disagree that howtoforge has outdated tutorials... It's maybe true that they are specified for an older version of Ubuntu/Debian but they usually work for the newer versions.
It depends on what you want to do. TLDP updates frequently.
In addition to TLDP and, to a lesser extent, Ubuntu forums, I have had great luck with the gentoo documentation. By and large all configuration is described using the config files, instead of tools. Typically, so long as you translate the installation steps, everything else should apply.
The arch linux documentation can be a great resource if you want to know how a package works, obviously this is applicable to arch however alot of the stuff is relevant to other distros.
i have noticed linux.com finially launched recently, i imagine they would have good content.
You will have to wade through some of the stuff, but you may find this site worthwhile:
- ShowMeDo - Showmedo is about learning and (Free and) Open-source software (FOSS). We were inspired to start Showmedo by watching some very effective web video-tutorials/screencasts.
Look for the "Installing and using Linux" or the Ubuntu series.
Note: don't be put off by all the dev stuff...