portal-ext.properties entries and Explanation

Place portal-ext.properties file below location or
liferay-portal-6.2-ce-ga2/tomcat-7.0.25
or

liferay-portal-6.2-ce-ga2/tomcat-7.0.25/webapps/ROOT/WEB-INF/classes


portal-ext.properties is used to override portal.properties file
and location of portal.properties file is

liferay-portal-6.2-ce-ga2\tomcat-7.0.42\webapps\ROOT\WEB-INF\lib\portal-impl.jar


This is used to override portal.properties file
1>passwords.encryption.algorithm = NONE
----------->This is used to Save password in normal form..By default Liferay Save passwords in encrypted format.

2>auto.deploy.enabled = true
--------------->This helps for autodeploy the plugin.

3>company.security.auth.type = emailAddress
------------>Default Authentication

4>company.security.auth.type = screenName
------------>This helps  the users to authenticate using Screen Name

5>company.security.auth.type = userId
------------->This helps the users to authenticate using user Id

6>theme.portlet.decorate.default = false
------------------> It will hide portlet border.

7>live.users.enabled = true
-------------->  to know number of live users 

8>openoffice.server.enabled = true
-------------->  To enable open office ,It will help to convert content into doc like pdf,doc etc 

9>terms.of.use.required = false
-------------> to disable the terms of use page