Liferay in centos - Problem when i changed the cofiguration

[shoan david，修改在13 年前。]

Hi All
I have a problem when i changes some changes made in the admin part.. and the whole site is down

I have done some configuration changes in the public virtual host (Friendly URL part) I will show where i did the changes

From the Dock menu -> My Places ->My Community ->Private Pages -> Enterprise Admin - > Community Portlet -> Actions -> Manage Pages -> Settings - > Virtual Host

Here there is two textboxes

Public Virtual Host - It was blank and i added (sitename.com)
Private Virtual Host - I didn't change anything

After this is done i cannot login to my site it says 500 internal server error.. I could not login to change the configuration back to the original. Please can anyone help to cure this issue

Thanks in advance

Shoan