You'll find a great deal of information about Unix and Linux in our Unix-to-Linux migration guide. In particular, check out the definitions of Unix and Linux. Then, move on to our Information kit: Linux, Unix and all the little ixes, a resource filled with links to many articles comparing Unix and Linux.
After all that reading, you may be ready to check out the fun side of Linux. You can do that by reading about the Linux mascot, Tux.
Dig Deeper on Linux servers
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