Install OLAT as described in the installation chapter but DON'T RUN 'ant dbsetup'!! We recommend to move your existing installation from PATH_TO_YOUR_OLAT/olat3 to PATH_TO_YOUR_OLAT/olat6.0.x and install the 6.1.1 package as your new PATH_TO_YOUR_OLAT/olat3. All user data is located in the olatdata directory which should not be located in the PATH_TO_YOUR_OLAT/olat3. The olatdata directory and the database won't be changed when installing the new code.

#cd PATH_TO_YOUR_OLAT
        #rm olat (if olat is a symlink, otherwise: mv olat3 olat6.0.x)
        #unzip OLAT-6.1.1.zip
        #ln -s OLAT-6.1.1-PUBLIC-XXXXX olat
        #cd olat
        #cp build.properties.default build.properties
        #vi build.properties
        #ant install

Your database will be upgraded with new tables/colums automatically upon the first startup. See PATH_TO_YOUR_OLAT/database for altering code for your database. Succesfull upgrades are listet in PATH_TO_OLATDATA/system/installed_upgrades.xml

Now start tomcat.