Jai Keerthi

Lets install Rails 3 stable on ubuntu 10.4. I am going to use Ruby 1.9.2 with Ruby Version Manager and Ubuntu 10.4 32 bit version

Initially, install the necessary tools for our installation

sudo apt-get install gcc g++ build-essential libssl-dev libreadline5-dev zlib1g-dev linux-headers-generic libsqlite3-dev

Install Ruby 1.9.2 from Ruby version Manager (RVM). Official Rvm references available at here. Make sure that curl and git installed (from above).

bash < <( curl http://rvm.beginrescueend.com/releases/rvm-install-head )

After installing Rvm for the first time in your machine, you must write the following script in your profile page at very end after the load path.

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"

After adding the above lines in to the profile, you have to make some more changes in Ubuntu.

[ -z "$PS1" ] && return

You need to replace the above statement with if and indent code stated below till rvm loads script and add fi to the end of if statement. After the changes, your code will look like

if [[ -n "$PS1" ]]; then
# Existing code here...
fi
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Loads RVM into terminal.

we can make sure that the rvm is installed successfully on our machine by using the following command in the new terminal

$ type rvm | head -n1

if your rvm installed properly, you will get response as,

rvm is a function

Now we have successfully installed our RVM. Next we have to install Ruby 1.9.2. Just enter the below code in you terminal.

$ rvm install 1.9.2

IIt will take several minutes to install in your machine. After it has been installed we have to make Ruby 1.9.2 as default ruby version on to our machine.The following code will help you to achieve that

$ rvm --default 1.9.2

you can test your ruby version by

$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]

Lets install Rails 3, simply typing following command in your terminal

gem install rails

make sure rails 3 is installed

rails -v

After installing rails we have to install sqllite3, to install use following lines on your terminal

sudo apt-get install sqlite3 libsqlite3-dev

Lets finally install sqllite gem by using

sudo gem install sqlite3-ruby

Now all your dependecies for installing rails3 are completed, create your “hello world” project and run it.