Hi Nagma,

Download the Force.com Migration Tool if you want to perform a file-based deployment of metadata changes and Apex classes from a Developer Edition or sandbox organization to a production organization using Apache's Ant build tool.
Download the Force.com Migration Tool from the Force.com Migration Tool page in Salesforce Developers.
Save the salesforce_ant.zip file and unzip its contents to the location of your choice.
The salesforce_ant.zip file contains the files you need to run an ant task that exercises the compileAndTest API call, including:
A Readme.html file that explains how to use the tools
A Jar file containing the ant task: ant-salesforce.jar
A sample folder containing:
A codepkg\classes folder that contains SampleDeployClass.cls and SampleFailingTestClass.cls
A codepkg\triggers folder that contains SampleAccountTrigger.trigger
A mypkg\objects folder that contains the custom objects used in the examples
A remove code pkg folder that contains XML files for removing the examples from your organization
A sample build.properties file that you must edit, specifying your credentials, in order to run the sample ant tasks in build.xml
A sample build.XML file, that exercises the deploy and retrieve API calls

Please refer the below link for reference.

• https://help.salesforce.com/articleView?id=code_tools_ant_using.htm&language=en_US&type=0

I hope it will be helpful.

Please mark it as best Answer if the information is informative.

Best Regards
Rahul Kumar