@anantha-1,
You can do this in multiple ways.
1. Servlet - you can create a servlet that you would call to invoke OSGI backend operations on your AEM content pages. As an extra safety measure, you can create a content package from production, upload it into your development environment, and then run the servlet. Once when the content has been updated, package up the content and upload + install back into production.
2. Our of the box "edit" feature - From the Touch UI, you can select multiple pages, and then click on the edit button; this will allow you to edit page properties for more than 1 page, all together.
3. AEM Groovy Script Console - with your groovy console plugin within your AEM environment, https://github.com/icfnext/aem-groovy-console, you can write a custom groovy script that you would call to invoke OSGI backend operations on your AEM content pages. As an extra safety measure, you can create a content package from production, upload it into your development environment, and then run the servlet. Once when the content has been updated, package up the content and upload + install back into production.