Error installing Rails on Ubuntu 11.10 (Gem::DependencyError)

Rails
1

I’m trying to install Ruby on Rails on Ubuntu 11.10, but receiving this
error:

$ sudo gem install rails
ERROR:  While executing gem ... (Gem::DependencyError)
    Unable to resolve dependencies: rails requires activesupport (=

3.2.3), actionpack (= 3.2.3), activerecord (= 3.2.3), activeresource (=
3.2.3), actionmailer (= 3.2.3), railties (= 3.2.3)

How can I fix this?

Note: Git (1.7.5.4 ) and Ruby (1.9.2p290) are installed properly.

2

On Sat, Mar 31, 2012 at 12:00 AM, Paulo C. [email protected]
wrote:

How can I fix this?

Note: Git (1.7.5.4 ) and Ruby (1.9.2p290) are installed properly.

How did you installed Ruby?
Do you have an updated rubygems?

–
Leonardo M…
There’s no place like ~

3

gem update --system

4

On 31 March 2012 04:00, Paulo C. [email protected] wrote:

I’m trying to install Ruby on Rails on Ubuntu 11.10, but receiving this
error:

$ sudo gem install rails
ERROR: While executing gem … (Gem::DependencyError)
Unable to resolve dependencies: rails requires activesupport (=
3.2.3), actionpack (= 3.2.3), activerecord (= 3.2.3), activeresource (=
3.2.3), actionmailer (= 3.2.3), railties (= 3.2.3)

I strongly advise that you use rvm to install ruby and rails (I am
assuming that you are not using rvm as you have used sudo on gem
install).

Colin

5

On Sat, Mar 31, 2012 at 5:25 PM, Alex M. [email protected]
wrote:

gem update --system

Actually, that might not work on a Debian based distro if rubygems has
been installed via apt packages.
That’s why I asked how Ruby was installed.

–
Leonardo M…
There’s no place like ~

6

Hi,

Colin is right, using RVM has lots of advantages! You can have
multiple Rubies and Gem versions, Gemsets for projects, etc. Highly
recommend because without it you’re gonna have a tone of Gem version
problems later.

We made a 1 line script for Ubuntu which installs Wayne’s RVM, with
RVM installs a Ruby version 1.9.2 then creates a Gemset which installs
Rails3.2. Just updated it for you! :slight_smile:
Would be great if you’d give a try. Report me back how it worked
please, I’d like to publish it.

Welcome on Rails!
YogiZoli