You can record some items without any basis for ranking.
1. IBM Linux Technical Center:
Http://www.ibm.com/developerworks/cn/linux/
This is a very good online technical document. I have found answers on many basic Linux-related knowledge!
2. softpedia
Http://linux.softpedia.com/
The latest release of the Linux open-source package can be found in this directory.
3. kernel source station, so nothing will be said.
Http://www.kernel.org/
4. There is nothing to say about the GNU website.
Http://www.gnu.org/
5. Microsoft's Linux
Http://www.mslinux.org/
Not to mention that Windows and Linux are the opposite. Ms Linux is also a very good learning material, and I have always appreciated the MS technology.Article. In particular, its. NET technology, and another Linux, should be a development trend in the future. The Web technology is also very good!
6. Red Hat. There is nothing to say about it. Some of its technical articles (in the knodge DGE base project) are also very good.
Http://www.redhat.com/