Is it possible to create Ubuntu Shirts ( Merchandise )

Solution 1:

Yes it is possible, so long as you follow the Trademark policy, the trademark page lists the policies (community advocacy probably applies to your activity).

http://www.ubuntu.com/aboutus/trademarkpolicy

Additional information is provided on the following links

http://design.ubuntu.com/assets/ubuntu-logo

Downloads - http://design.ubuntu.com/downloads?metadata=element-logo+brand-ubuntu

If you have questions, Contact Canonical Legal.