RedMineのバージョン確認

RedMine

手順（シェル上から）†

# ruby script/about
/usr/local/lib/ruby/1.9.1/yaml.rb:84:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.

Environment:
 Redmine version                2.3.3.stable
 Ruby version                   1.9.3-p448 (2013-06-27) [x86_64-linux]
 Rails version                  3.2.13
 Environment                    production
 Database adapter               Mysql2
Redmine plugins:
 no plugin installed