Also refer some of the docs [1] [2] to understand about indexes and its configuration[1] https://docs.adobe.com/docs/en/aem/6-0/deploy/upgrade/queries-and-indexing.html[2] http://jackrabbit.apache.org/oak/docs/query/lucene.html

Just remove the version and just say <scope>provided</scope>. See if this helps !<dependency><groupId>com.day.cq</groupId><artifactId>cq-commons</artifactId><scope>provided</scope></dependency>

what is the version you have mentioned in you pom.xml ?

To quickly check, you can check the log in the windows system and see what is the URL that is printed for this[Tue Apr 12 16:35:34 2016] [I] [9847] "GET /bin/wcmcommand?cmd=open&path=%252Fcontent%252Fcountry-sites%252Fu%252Fen&_charset_=utf-8" 404 5336 9ms

I think, its the problem with UTF-8 charset with the URL. May be in RedHat, it is not encoding the URL with UTF-8 and hence it is not able to resolve the URL.

Check if you have allowed the filters for /bin/* in your dispatcher

Have you set up sticky connections ??If you are managing sessions between 2 pub instance with 1 web server, you need to configure the sticky connection in the dispatcher

Are you referring to the column control components ?

I dont see you defining the nested grid in the above piece of Code. Where have you grouped 8 columns here ??refer slide #29 here http://www.slideshare.net/GabrielWalt/aem-responsive to achieve the nested grid.

It is already released.. you can refer the same here [1] [2][1] https://helpx.adobe.com/experience-manager/using/creating-touchui-validate1.html[2]http://adobeaemclub.com/custom-color-picker-component-in-granite-ui-in-aem-6-1/