how can i change the site URL for sites created under sites.google.com/site

Sites created under sites.google.com/site can be mapped to a custom domain. You can do this using the Site Settings area.
Note that you must own the domain. And you must have access to change CNAME records.



1.Click on the "More Actions" menu at the top of the screen .
2.Then click on "Manage Site" .
3.Click on "Web Address"
4.Add the Web Address in the text box provided.
5.Click the Add button.
Some things to keep in mind about changing your site URL:


•Mappings are restricted to sub domain level only like www.example.com, wiki.example.com, or support.example.com. Google don't support naked domain mapping like example.com.
•You can map up to 5 sub-domains to a given site
•This only takes effect for public sites private sites will redirect to the standard URL
Once you have completed the steps above, you will need to be sure to follow the next steps:



1.Sign in to your domain registrar.
2.Navigate to your DNS Management page. The location and name of this page will vary by host, but can generally be found in Domain Management or Advanced Settings.
3.Find the CNAME settings and enter the following as the CNAME value or alias: (sub domain)
4.Set the CNAME destination to the following address: ghs.google.com
5.Save changes with your domain host

by following all above instructions you can change your site URL for sites created under sites.google.com/site