There are at least 300 different distributions, and the open-source model of the kernel allows you to make your own distribution.
There are many open-source OS distributions (distros) branching out from the Linux Kernel. Ubuntu, Linux Mint, Puppy, to name but three.
GNU/Linux? Plenty. Debian, Ubuntu, Arch Linux, Gentoo, Slackware, Fedora, and many more. Non-GNU Linux? Android.
Yes, Linux is like an operating system much like Windows OS or Mac OS. Linux is kind of like a community of Operating Systems. A popular OS from Linux is Ubuntu.
Apple is more popular Linux is ok OS is Crap. There you go! You got an answer!
Android is a Linux OS
Ubuntu is a Linux distribution (as in a specific OS setup with the Linux kernel.)
This is the problem, no one really knows. Unlike Windows or OS X, Linux doesn't really have you "register" or phone home to anyone, so no statistic on how many Linux users there are is accurate. I personally estimate Linux users number at least as much as OS X users, though many will not agree with me.
Linux.
Most Linux OS's walk you through dual booting. Choose your prefered Linux OS and burn it to a disc and run it. You could also partition your hard drive from the XP side and create a space for your Linux OS to run in. If you are new to Linux, it is recomended to run the OS without actually installing it, that way you can get the feel of Linux without completely installing it.
LINUX and UNIX are vendor independent OS
nokia mobile supports windows OS and the sony erricission ,Motorola supports Linux OS.
Linux is a operating system, just like Windows and Mac OS. Unlike Windows and Mac OS Linux is free and open source. Some popular Linux distributions include, Fedora, Redhat, Ubuntu, Centos, and many more. If you would like to play around with linux try downloading a virtualization program and installing Linux on it.