• ruby 1.8
  
  
  

  # apt-get install ruby 
  # ruby -v 
  ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] 
   

• ruby on rails
  
  
  

  # apt-get install rails 
   

• ruby gem
  
  
  

  # apt-get install gem 
   

• rails install
  
  
  

  # gem install rails 
   

• rack
  
  
  

  # gem install rack 
   

• mysql
  
  
  

  create database redmine character set utf8; 
   

• config/database.yml.example
  
  
  

  # mv database.yml.example database.yml 
  production: 
    adapter: mysql 
    database: redmine 
    host: localhost 
    username: root 
    password: mypassword  
    encoding: utf8 
   

• gem install mysql
  
• rake generate_session_store
  
• svn co http://redmine.rubyforge.org/svn/branches/1.2-stable redmine-1.2
  
  

# rake db:migrate 
(in /var/www/redmine) 
Missing the Rails 2.3.11 gem. Please `gem install -v=2.3.11 rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.