There are quite a few...
This is a standard collection of linux documentation. The Systems Administrators Guide mentioned previously is part of the collection
This is a tutorial starting at the basics.
You might tell us if you have any experience in running linux on an individual system and what kind of expertise you are expected to have.
If you do not have a to use or abuse/we'll practice on this one system, you might build or get a hold of an old PC, anything beginning at an Intel P4/AMD Athlon with 512MB or more of RAM, an Nvidia graphics card, and a CD-ROM drive.
Here is the standard linux live-cd list as a sampler. It has various versions of linux, including several useful aid and rescue tools
Remember to burn a live-cd as an image file.
By the way, around here ignorance is not considered stupid.