no problem, you'll get it in time
There are some changes in Linux.
cd..(windows) = cd ..(Linux)
cd name_of_directory(the same in both)
windows) = cd /(Linux, "sort of")
The hierarchy of Linux file organizing is a little different. You don't have a c: d: e: .... but you have all organized in one big tree. This tree of directories starts at / (called root). You can change to a directory in two ways.
if you are in /home/your_username
cd Desktop (is the same as) cd /home/your_username/Desktop
The first way was from your home directory and the second way was an absolute way to the Desktop directory.
cd to /etc/X11 means you have to change directory to /etc/X11. And by now you probably know how to: (just type in these lines)
cp XF86Config XF86Config.backup (make a backup copy in case you mess up
(a text editor called Emacs will open the config file for your XF86 (the GUI(Graphical User Interface) server or the X).
Use Emacs like any other text editor, and scroll through the file to find the lines saying
(Here adjust the HorizSync and VertRefresh to your monitors default values (find them in your monitors manual, or search the web. Just replace the values with yours.)
(Here adjust the resolution if it is to big for your monitor. Just replace values with the one from your manual.)
When you're done editing, you have to do two more things.
press CTRL + x --> + s (this means first CTRL + x (still holding CTRL (release x) and press s(while holding CTRL) (this saves the file)
press CTRL + x --> + c (the same way as above) (this closes emacs)
Hopefully you will now be answering from Linux