It is difficult to measure, but most experts agree that Linux is quickly expanding on the desktop market.
On other markets Linux has already had a pretty strong presence, in many it already is the dominant operating system (Servers, Cluster/Farm Computing, Supercomputers.).
Linux Internals is a book about how Linux works.
Linux World is the Linux Development & Training Center
The courses available for Linux include Linux server, Linux desktop, bash shell, and many others.
One can obtain the latest Linux news on websites such as CRN, Linux Today or Distro Watch. One can also find news about Linux on Arch Linux and Linux Journal.
The short answer is that Linux is a computer operating system, and is an alternative to older products such as DOS, Windows, MacOS or UNIX. The way that Linux is written and distributed is new and revolutionary - it is maintained by an open community of programmers and you can get it for free. This has created a growing industry of distributors who bundle Linux and other useful stuff into a distribution package or distro, to make life easy for the end user. This method of development and distribution is protected by an equally revolutionary license, the GNU Public License
linux
Linux Flavour
No, it is unix-based but Linux is a kernel not an operating system.Ubuntu,Linux Mint,Debian,and puppy Linux,ect. are OS's that use the Linux kernel.
Linux does not have a "manufacturer." Linux development is guided by the Linux Foundation and Linus Torvalds, with contributions from thousands of companies and individuals.
No, but Linux is based on Unix since Linux is a Unix clone.
There are lots of Linux-oriented wikis. There is no official wiki for the Linux kernel.
I think it was the Linux kernel. There are many used with Linux now.