Selenium server:

Selenium server can be downloaded from following location

go to this path
http://seleniumhq.org/download/



click on "2.0b3" to download the jar file



Copy the jar file into your local. Here I have copied to D:\selenium\Selenium Server
Following command used to start the server
cmd:\......>java -jar Selenium-Server.jar



Note: -jar stands for java archive file. Here it’s a standalone file.