hi 

i have windows server 2008r2 and i installed sharepoint 2010 on this server .

now i need to upgrade to windows server 2012 and upgrade to sharepoint 2013 .

how i can do this 

thanks 

Hi,

Please refer following links for Upgrading Windows server 2008r2 to Windows Server 2012:

Windows Server Installation and Upgrade

Performing an in place upgrade of Server 2008 R2 to Server 2012 R2

Please refer following link for Upgrading SharePoint 2010 to SharePoint 2013:

Upgrading from SharePoint 2010 to SharePoint 2013 Step by Step

Hope this helps :)

I hope Reema clarifies your concern to get this job done.

Post Upgrade/ Migration steps to migrate from SharePoint 2010 to SharePoint 2013 - See more at here

Also have a look on this step by step guide on upgrading a SharePoint 2010 site to a SharePoint 2013.

You may also take help from this article describes how to perform a full-version upgrade of the operating system of a SharePoint Server 2010 or SharePoint Server 2013 server.

To learn about the process of upgrading databases, service applications, My Sites, and site collections to SharePoint 2013 check out this article

Moreover, If you wish you may also try this automated solution which lets you to migrate from SharePoint 2010 to SharePoint 2013 without any interruption.

Hope it helps you!