Everything.*
* Subject to your own understanding and skills.
The advantage to being able to modify Unix (or Linux, etc.) is that you can customize it to your liking, and in the case of Linux and its variants you can sell the changes. The disadvantage would be support; if you make a change you are responsible for fixing any problems that may develop.
Yes you can modify your computer but that will require very high level of skill to modify your operating system. If you are using Linux then it is easier to modify the way your computer runs.
Read this article, it shows you how to customize windows before you install it. http://www.goitexpert.com/entry.cfm?entry=Windows-Installation-Customization There is another one that shows you how to optimize Windows XP at; http://www.goitexpert.com/entry.cfm?entry=XP_Optimazation_Vol1
In Linux, the lp command is commonly used to print a file. For example, you can use lp filename.txt to send the file filename.txt to the default printer. Alternatively, the lpr command can also be used in a similar way, such as lpr filename.txt. Both commands allow for additional options to customize the printing process.
Linux Internals is a book about how Linux works.
You can customize them online.
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.
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
Linux Flavour