After receiving a comment on my post about installing Rails on Ubuntu Feisty Fawn via RubyGems, I found, to my surprise, there exists a rubygems package in the Ubuntu Feisty Fawn universe repository. Though it is a bit outdated at 0.9.0, while the latest is 0.9.2.
So the commenter ran into a problem trying to use the repository installed rubygems and when executing in the terminal rails 
, they would get a command not found error.
In actual fact, the rails program does exist but in another path ( /var/lib/gems/1.8/bin 
).
There are two solutions to this. If you want to use the rubygems package from the repository, go with solution 1. Personally, I would go with solution 2.
Select your poison.
Solution 1: Modify your PATH environment variable
Open up ~/.bashrc (This is in your home directory). Append the following:
export PATH=$PATH:/var/lib/gems/1.8/bin
Now either source your .bashrc (source ~/.bashrc ) or restart your terminal. But it should work fine after this.
Solution 2: Remove the rubygems package and install via source
sudo apt-get remove rubygems
Then continue with my guide on installing Rails on Ubuntu Feisty Fawn via RubyGems.
