attrib
Alter the file attributes. The '+' adds an attribute, and '-' removes it. Attributes are: a=archive; r=read only; s=system; h=hidden.

cd
Navigate into a directory.

Note that a directory is also referred to as a folder.

cd.. navigates up one level. Say you are in the 'foo' directory and want to get out of this directory. This would get out of 'foo'

cd <directory name> navigates to that directory. You can provide a path of directories \ e.g.
cd Users\myself\Documents\git\mycode takes you to C:\Users\myself\Documents\git\mycode

del *.* will delete every file in the current directory.

(Note: del alone cannot be used to delete other directories. Use rd to remove a directory.)

del *.html will delete all HTML files at your current location.

del foo*.* will delete all files beginning with 'foo' that are any type.

del foo??.* will delete files that are 5 characters long and begin with 'foo' that are any type.

dir *.html displays all HTML files in the current and subdirectories.

dir /s lists the contents of all subdirectories.

dir /ah displays all hidden files.

help
Displays DOS help info. For info on an individual command simply type help followed by the command.

help md displays information on the cls (make directory) command.

md
Generate (make) directory. Creates a new directory at your current location. May also substitute with mkdir

md boo create 'boo' directory.

rd
Delete a directory. Note that the directory you want to remove not have any files. The command rmdir may be used instead of rd

rd boo deletes the 'boo' directory

renameRenames a file.

rename foo.html zoo.html

type
Pipe (display) the contents of a file to terminal. If the file doesn't contain text (e.g. image) gibberish (binary encodings) will be displayed. If you pipe this command to more with "|more" then the text will be displayed one page at a time.

type site\index.html|more displays index.html one page at a time.