Create an Enterprise wiki (SharePoint Server 2010)

You can create an Enterprise wiki by two ways:

•     Create an Enterprise wiki by using Central Administration
•     Create an Enterprise wiki by using Windows PowerShell

  To create an Enterprise wiki by using Central Administration

  1. Verify that you have the following administrative credentials:
     
     • To use Central Administration, the user account that is performing this procedure must be a member of the Farm Administrators group.
       
  2. On the Central Administration Web site, in the Application Management section, click Create site collection.
     

     Note:
     You can also create an Enterprise wiki as a sub-site of another site by clicking New Site on the Site Actions menu.

     
     
  3. In the Web Application section, click the Web Application drop-down list to select the Web application where you want to create the Enterprise wiki.
     
  4. In the Title and Description section, type a title in the Title box and, optionally, type a description in the Description box.
     
  5. In the Web Site Address section, select / to create the Enterprise wiki at the root of the Web application, or select /sites/ to create the Enterprise wiki site at a specific path. If you select /sites/, you must also type the site name.
     
  6. In the Template Selection section, click the Publishing tab, and then click Enterprise Wiki.
     
  7. In the Primary Site Collection Administrator section, type the user name for the user who will be the site collection administrator.
     
  8. In the Secondary Site Collection Administrator section, type the user name for the secondary administrator of the site collection.
     Designating a secondary site collection administrator is a best practice to ensure that someone can manage the site collection when a primary site collection administrator is not present.
     
  9. If you are using quotas to manage storage for site collections, in the Quota Template section, click a template in the Select a quota template list.
     
  10. Click OK.
      
      

      Create an Enterprise wiki by using Windows PowerShell

      You typically use Windows PowerShell to create an Enterprise wiki when you want to automate the task, which is common in enterprises.
      

      Create an Enterprise wiki by using Windows PowerShell

      Verify that you meet the following minimum requirements: 
      
      1. • See Add-SPShellAdmin.
           
      2. On the Start menu, click All Programs.
         
      3. Click Microsoft SharePoint 2010 Products.
         
      4. Click SharePoint 2010 Management Shell.
         
      5. From the Windows PowerShell command prompt window (that is, PS C:\>), type the following commands:
         
         1. To display all the site templates, type the following command:
            
            Get-SPWebTemplate
            

         2. To create a variable that contains the name of the Enterprise wiki template, type the following command:
            
            $wikitemp = Get-SPWebTemplate "ENTERWIKI#0"
            

         3. To create an Enterprise wiki site, type the following command:
            
            New-SPSite http://contoso.com/CWiki -OwnerAlias <domain\user> -Template $wikitemp
            

            Where <domain\user> is the user name of the site owner.
      
      A very good article by Bernd Kemmler on Wiki's in SharePoint 2010 . Have a look. I am sure it will resolve your query.