gem sources fails with a ETIMEDOUT

gem sources -a http://gemcutter.org Error fetching http://gemcutter.org: Errno::ETIMEDOUT: A connection attempt failed because the connected party did not properly respond after a period of time, or established conn ction failed because connected host has failed to respond. - connect(2) (h tp://gemcutte开发者_JAVA技巧r.org/specs.4.8.gz)

How do I fix this issue?

You can simply put sources into config file in your home directory.

cat ~/.gemrc

---
:sources: 
- http://rubygems.org

I got similar message when I tried to install an app. And the problem was that at work my pc was behind a proxy. so, I solved by doing this:

gem install whatever --http-proxy=http://user:pass@proxy:port

http://help.rubygems.org/discussions/problems/799-ruby-gem-install-problems-on-windows-xp