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Depends what you mean. There are hundreds of desktop distros, but linux is much more popular than you would imagine. Android, the Wii, almost all servers, most checkout monitors, and many public displays (airports, fast food menus, etc) all run linux. So, there are a few hundred distros, but I'd estimate there are over 10000 "versions" in use across the world.
What else can I help you with?
Can you run AutoCAD on Linux?
AutoCAD is not developed for Linux. Some versions will run in Wine, but most recent versions will not.
Which version of Linux from Redhat Software is free?
Not all version of Redhat Linux is free but you can download many desktop versions free.
How do Linux developers regulate all the versions of Linux produced?
They don't.
What are the different remote administration tools in Linux and UNIX?
The question is too vague to answer clearly. There are too many versions of Linux and Unix and third party vendors.
Where can you find LiveCDs of previous versions of Linux?
Many distributions have older disk images in their archives. Try there.
Linux is distributed by several different companies whose versions of Linux are sometimes called what?
Distributions
What are versions of Linux operating system?
"Distros", or distributions.
Does Linux work on PC?
Generally yes. Most Linux versions will work on a standard home PC, and many will work on one too old and slow to run Windows.
Can you use the same installation procedure for all versions of Linux?
No.
Is it possible to install coreldraw on Linux?
Some versions of CorelDRAW can be run on Linux using Wine, while others can't.
What is the default configuration file for the Linux loader?
For older versions it is "/etc/lilo.conf" and for newer versions "/boot/grub/grub.cfg".
What is the current full featured version of the Linux kernel?
All versions of the Linux kernel are "full featured." The latest stable version of the Linux kernel as of May 17, 2011 is 2.6.38.6.
