Couldn't find any package by regex - ruby

Solution 1:

To install Ruby on Ubuntu 12.10, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the commands below:

sudo apt-get install ruby1.9.3

To Install Gems

sudo apt-get install rubygems

To install all of Rails and its dependencies

sudo gem install rails

For more info check the Ruby Website

From researching, it says that ruby1.9.3-dev doesn't exist. And that ruby1.9.1-dev is its alias. Here is what I've done. I installed ruby as stated above, and then ran the command sudo apt-get install ruby1.9.3-dev, and I got the same error. But when I ran sudo apt-get install ruby1.9.1-dev, this is what I got: