Comments on: Screencast: How to Install Ruby on Rails on Ubuntu?

By: Thangaraj

Thangaraj — Sun, 17 Jan 2010 01:27:30 +0000

Good job Aslam. It worked for me. Thanks for the screencast

By: Indika

Indika — Wed, 25 Nov 2009 07:57:53 +0000

Great screencast.
Got everything up and running.

Thanks

By: Aslam

Aslam — Thu, 12 Nov 2009 03:37:03 +0000

@James
Seems that your Ruby interpreter cannot understand the ‘require’ keyword. This may happen if your installation failed before the completion.
Remove Ruby totally from your computer and then do a fresh installation. Make sure your internet connection during the installation.

By: Dunith Dhanushka

Dunith Dhanushka — Thu, 29 Oct 2009 15:32:01 +0000

Great job Aslam!.. It totally worked for me. I was trying to develop a Ruby client for Apache ActiveMq broker. This was really helpful to me…

By: James

James — Tue, 13 Oct 2009 23:41:37 +0000

I went through everything on the screencast just fine, until I went to install rails, and got this message:

/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/package.rb:10:in `require’: no such file to load — zlib (LoadError)
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/package.rb:10:in `’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/format.rb:9:in `require’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/format.rb:9:in `’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:11:in `require’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:11:in `’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:3:in `require’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:3:in `’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/commands/install_command.rb:4:in `require’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/commands/install_command.rb:4:in `’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:167:in `require’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:167:in `rescue in load_and_instantiate’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:159:in `load_and_instantiate’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:88:in `[]‘
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:144:in `find_command’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:131:in `process_args’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/command_manager.rb:102:in `run’
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/gem_runner.rb:58:in `run’
from /usr/local/bin/gem:21:in `’

Any ideas? I’ve looked all over and tried lots of stuff but nothing seems to work.
Thanks,
James

By: Sharief Shaik

Sharief Shaik — Thu, 24 Sep 2009 10:38:27 +0000

Nice post. Iam new to ubuntu(Linux) and your screencast eased my way for my setting up the RoR environment.

By: Gaveen

Gaveen — Mon, 17 Aug 2009 12:14:34 +0000

Corrections to my last comment, sorry.

1. I meant “refer the documentation” not “defer to the”.
2. And the characters before the no-ri and no-rdoc options are double dashes (- -) without a space in between. It might not be obvious in the comment.

By: Gaveen

Gaveen — Mon, 17 Aug 2009 12:08:37 +0000

@Shaakunthala:
You can add –no-ri and –no-rdoc to avoid installing the online documentation for the gems. But this is not recommended if you plan to defer to the documentation. (ri and rdoc are similar to man pages and javadoc). Avoiding them however speeds up the gem installation.
Eg: sudo gem install –no-ri –no-rdoc rails

By: ශාකුන්තල

ශාකුන්තල — Sun, 16 Aug 2009 18:23:48 +0000

Thanks again for your explanation.

By: Aslam

Aslam — Sun, 16 Aug 2009 17:01:27 +0000

Thank you for your feedback Shaakunthala!

Yeah, I agree. I’ll increase the volume in upcomming screencasts. Also I would like to give the original high quality video to download very soon.
I hope you can hear clearly in the original video.

The answer to your question is,

apt-get and yum will install bunch of file one by one like a queue and displays the downloading file and the state in terminal.

But in the case of Rails installation, you are actually installing different 7 number of gems, rake, activesupport, activerecord and so on. You need all these gems to create and run Rails apps. During the Rails installation process you can see, it’ll only prompt when a gem successfully installed.Unlike apt-get and yum it wont show downloading files one by one. So, It looks like long process.

Welcome to the Ruby word!