Ubuntu 16.04 LTSでRedmineを2.5から3.3に上げてみる ref: http://qiita.com/babydaemons/items/4cff48d4f850e0aad9ea

file0.txt

$ svn co https://svn.redmine.org/redmine/branches/3.3-stable redmine-3.3

file1.txt

$ svn checkout http://svn.redmine.org/redmine/branches/2.5-stable redmine

file2.txt

$ sudo apt-get install imagemagick libmagickcore-dev libmagickwand-dev

file3.txt

$ gem install bundler
$ cd redmine-3.3
$ bundle

file4.txt

$ tar cf - files -C ~/redmine | tar xvpf -

file5.txt

$ rake generate_secret_token

file6.txt

$ cp -p ~/redmine/config/database.yml config
$ RAILS_ENV=production rake db:migrate

file7.txt

$ RAILS_ENV=production rails s -b example.com -p 3000

file8.txt

$ sudo /etc/init.d/apache2 restart