I am migrating SharePoint 2010 project to online SharePoint 2013. I managed to move lists, document libraries..etc. with sandbox solutions.
But can any one help me how can I deploy the farm solutions?
SharePoint Stack Exchange is a question and answer site for SharePoint enthusiasts. It only takes a minute to sign up.Sign up to join this community
In SharePoint Online you can not use Farm solutions! You are limited to sandboxed solutions and Apps.
You would have to rewrite and rearchitect your solutions to one of those two patterns.
For sandboxed solutions, see here: http://msdn.microsoft.com/en-us/library/office/gg454741(v=office.14).aspx (Please note that sandboxed solutions, that are not no-code solutions, are deprecated: http://blogs.msdn.com/b/sharepointdev/archive/2014/01/14/deprecation-of-custom-code-in-sandboxed-solutions.aspx)
For apps, see here: http://msdn.microsoft.com/en-us/library/office/jj163114(v=office.15).aspx