I just want share my experience when my first time deploy rails application using FastCGI. Here's step by step of installation fastCGI for your rails application.


preparation offline

• Already have Database and hosting server in 1 package with linux OS
• Already Complete ruby on rails application
• export your database to file or dump your database to external file.
• Go to your appz_name/config/environment.rb. You need to uncomment the following line to confirm you're in production mode:

• Modify your appz_name/public/.htaccess file by changing some parts to the following below:
  

• Set up your database in your hosting or db server online, create 3 databases, after that match it to appz_name/config/database.yml if you found difference setting, fix it. Your database.yml must be the same like your setting in database server including database password, username, database name.
• Now, the last step, go to appz_name/public you will see 3 files with named dispatch*.*. Open them and change their first line to be
  

#!/usr/local/bin/ruby

• edit your routes.rb in appz_name/config/and uncomment :

map.connect '', :controller => "your_main_controller_name"

• delete or rename your index.html in appz_name/public
  
• Attach or archive your app project folder in zip or tar.tgz.

preparation online

• use your putty to access your shell console account of your hosting. After logged, Go to your /home/username upload your attached app project folder to this area then extract it.
• your will get your project rails folder from your extracted file.
• Back up your existed public_html :

mv ~/public_html ~/public_html_backup

• I forget to tell you the most important thing, that is you must chmod 755 dispatch*.* in your /home/username/appz_name/public
  
• after that back to /home/username and run it:

ln -s ~/yourapp/public ~/public_html

Done !!! If you did all those steps correctly you will not see Application Error message in your browser. Have nice try and good luck.