“gem install rails” fails with DNS error

Question

$ rvm use
Using /home/owner/.rvm/gems/ruby-2.1.2
$ gem install rails
ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
    Errno::ECONNREFUSED: Connec         


        

Answer 1

I had the same problem when trying to install premailer and upgrading ruby to current stable version (2.3.0) fixed the issue.

with rvm:

rvm install 2.3.0

rvm use 2.3.0

gem install premailer 

of course, this applies to any gem, not just premailer