First, tools of the trade 
I used to think that installing software on windows was easy, until I started using Ubuntu. Trust me, it could never be easier. Just run these commands, and you are done.
sudo apt-get install apache2
sudo apt-get install mysql-server
sudo apt-get install ruby-full build-essential
sudo gem install rails
Thats all we need to start working with rails. You can verify if mysql is installed by logging into mysql. The default password is root. Try
mysql -uroot -proot
you should be able to log into mysql. You can check the version of mysql, using mysql ––version (remember, two dashes)
For ruby, run
ruby -v
The latest version as of this writing is 1.8.7. The output should be similar to this
ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]
For rails, run
rails -v
The latest version of rails as of this writing is 2.3.2. The output should be similar to this
Rails 2.3.2
Wondering why use gem to install rails instead of apt-get? gem is what we’ll be using to install all the ruby gems, so why not use it to install rails itself?
