Command prompt is very useful for us developers to run quick applications and commands.
Windows 8 has two modes - the new Metro mode and the old
traditional Windows mode.
To launch the command prompt in the new Metro mode:
Hit the WIN+Q key to launch the Apps search bar and type cmd. You
will see Command Prompt in the results. Click it to launch a Windows command
prompt.
In traditional mode:
Hit WIN+X and select Run from the command prompt.
In the Run dialog search text box, type cmd and click OK.
Command Line Commands
Here is a complete list of command line commands:
http://technet.microsoft.com/en-us/library/cc772390(v=ws.10).aspx