I was trying to install Rails the other day at work and they had just finished implementing some “new improved” firewall security rules. Well needless to say, this broke my ability to install Rails. Although, I didn’t realize this at first. I kept getting the following error when I tried to install Rails:

ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError)
getaddrinfo: no address associated with hostname.(SocketError)

After some investigating, it turned out that some ports were being blocked on the firewall that did not allow me to install Ruby gems directly from the repository with the gem command. After some googling, I found the easiest solution at Ashish Kulkarni’s Blog. Thanks Ashish!

Basically you do the following:

-Go to the rubyforge gems subdirectory and download the following:

1. activesupport
2. activerecord
3. actionwebservice
4. actionpack
5. actionmailer
6. rails

-Now go to your command prompt and change to the directory where you downloaded the gems and execute the following:

1. gem install activesupport
2. gem install activerecord
3. gem install actionwebservice
4. gem install actionpack
5. gem install actionmailer
6. gem install rails

That’s it! Now when you are behind a pesky firewall and get this error, you can work around it! Happy Coding!

Technorati Tags: Ruby on Rails, Ruby, Rails, Coding

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After some of my readers tried my tutorial on “How to install ruby on rails in Ubuntu Gutsy Gibbon (7.10)” they ran into some trouble installing the “mysql” gem. I finally found the answer after some Googling at Mentalized.net. The summary is below.

“mkmf.rb” is part of the “ruby1.8-dev” package. Since I already had this package installed on my system, I was not experiencing the error. I installed a fresh copy of Ubuntu Gutsy Gibbon (7.10) in VMware and sure enough, I encountered the error when installing the “mysql” gem.

-You need to install the “ruby1.8-dev” package by typing the following in the Terminal:
sudo apt-get install ruby1.8-dev

-You should be able to go ahead and install the “mysql” gem now by typing the following in the Terminal:
sudo gem install mysql

I apologize if you were getting that error when you followed my previous tutorial. The tutorial has been updated with this information. Happy Coding!

Technorati Tags: Ubuntu, Ruby on Rails

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I received this error when I tried to install Ruby on Rails on another Ubuntu Gutsy Gibbon (7.10) system the other day. After some Google searching I finally found my answer at Nabble.com.

Basically, you have to install “libopenssl-ruby” by typing the following in at the Terminal:
sudo apt-get install libopenssl-ruby

That’s it! You should be able to install Rails without that ssl error now.

I would also like to thank Reader, leondu, for pointing out that Ruby Gems is now at version 0.9.5. I have updated “How to Install ruby on rails on Ubuntu Gutsy Gibbon” to reflect the changes and the above error.

Happy Coding!

Technorati Tags: Ubuntu, Ruby on Rails, Programming

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Since, I just started dabbling in Ruby on Rails, I need to also deal with database software. My database of choice so far has been MySQL. I know this seems obvious to seasoned database programmers, but I always forget how to create a database from the command line MySQL client. This is probably because Ruby on Rails lets you manipulate the database through the Ruby language once the database is set up.

Thanks to snipplr.com, I found my answer. So, here it is as a reminder to myself. Hopefully, it will help some of you as well.

-Login to MySQL using the following command at the Terminal.
mysql -u ''adminusername'' -p

-Create the database and add privileges to a user by typing in the following at the “mysql>” prompt.
mysql> CREATE DATABASE ''databasename'';
mysql> GRANT ALL PRIVILEGES ON ''databasename''.* TO "''username''"@"''hostname''" -> IDENTIFIED BY "''password''";
mysql> FLUSH PRIVILEGES;
mysql> EXIT

That’s it. Now I am reminded. Hopefully you are too.

Technorati Tags: MySQL, Ruby on Rails, Programming

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While I was installing Ruby on Rails in Ubuntu Gutsy Gibbon (7.10), I ran into the above error when I ran the command to install Rails:
sudo gem install rails -y

On one of my Ubuntu machines, I was lucky enough to just run the command again and get past the error. However, on another Ubuntu install, I could not get past this error.

I eventually found the answer to the problem at Army of Evil Robots.

You need to take the following steps to delete the RubyGems Cache file:
gem env
#which will give you something like this:
RubyGems Environment:
- VERSION: 0.9.2 (0.9.2)
- INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8
- GEM PATH:
- /usr/lib/ruby/gems/1.8
- REMOTE SOURCES:
- http://gems.rubyforge.org
Then…
rm -f /PATH/TO/GEM/PATH/FROM/ABOVE/source_cache

Then you may need to also do the following:
-For Ruby Gems 0.8.x or lower
gem update --system

Or

-For Ruby Gems 0.9.0 or newer
gem update

After this you should be able to run:
gem install rails -y

Happy coding!

Technorati Tags: Ubuntu, Gutsy Gibbon, Ruby On Rails

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Google Query: Install Ruby on rails in Ubuntu

I recently did a fresh install of Ubuntu Gutsy Gibbon on my home pc. I also dabble in Ruby on Rails programming. In the past I had a setup involving Xampp for Linux and some convoluted add-on packages. Not very friendly or scalable. This time I decided to set things up the real way.

I finally found my answer in the Ubuntu Community Documentation. Thankfully, the process to get Ruby on Rails up and running on Ubuntu Gutsy Gibbon (7.10) is fairly simple. The summary is listed below.

-Install Ruby with the following command
sudo apt-get install ruby rdoc irb libyaml-ruby libzlib-ruby ri

-Install Ruby Gems via source so apt-get won’t complain about files being changed by gem update –system
wget http://rubyforge.org/frs/download.php/29548/rubygems-1.0.1.tgz
tar xzvf rubygems-1.0.1.tgz
cd rubygems-01.0.1
sudo ruby setup.rb
sudo gem update --system

-Install Rails along with its dependencies
sudo gem install rails -y
If you run into the following error while trying to install Rails: “(Gem::Exception) SSL is not installed on this system”
Install libopenssl-ruby by typing the following at the Terminal:
sudo apt-get install libopenssl-ruby

-Install mysql because Ruby on Rails is not much use without a database behind it
sudo apt-get install mysql-server

-Install the mysql gem to go along with mysql
sudo apt-get install libmysqlclient15-dev
then
sudo gem install mysql
If you get the following error when trying to install the mysql gem, you may need to install the “ruby1.8-dev” package:
“extconf.rb:1:in `require’: no such file to load — mkmf (LoadError)”
Install the “ruby1.8-dev” package by typing the following at the Terminal:
sudo apt-get install ruby1.8-dev
Then try the following again:
sudo gem install mysql

That’s it! You should be able to create a new Rails app and setup your database.yml file so Rails can work with your mysql database.

Technorati Tags: Ubuntu, Gutsy Gibbon, Ruby On Rails

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