Thanks to http://martin-denizet.com/install-redmine-2-5-x-with-git-and-subversion-on-debian-with-apache2-rvm-and-passenger/
Install Redmine 2.5.x with Git and Subversion on Debian with Apache2, RVM and Passenger
it's notes
“Tell me and I forget, teach me and I may remember, involve me and I learn.” ― Benjamin Franklin.