Fetching source index for `http://rubygems.org/`
Could not reach rubygems repository `http://rubygems.org/`
Could not find gem 'rspec-rails (>= 2.0.0.beta.22, runtime)' in any of the gem sources.

export http_proxy=http://user:password@host:port

export HTTP_PROXY=$http_proxy

sudo -E bundle install

---
:benchmark: false
:verbose: true
:sources:
- http://rubygems.org/
- http://gems.rubyforge.org
:backtrace: false
:bulk_threshold: 1000
:update_sources: true
gem: --http-proxy=http://USERNAME:PASSWORD@ADDRESS:PORT

SET http_proxy=http://user:password@host:port

SET /P login="Enter proxy login: "
SET /P password="Enter proxy password: "
SET HTTP_PROXY=http://%login%:%password%@proxy.com:8080
SET HTTPS_PROXY=%HTTP_PROXY%

CLS

bundle install

echo $http_proxy

$ export http_proxy="http://username:password@host:port"
$ export ftp_proxy="http://username:password@host:port"
$ sudo visudo

Defaults env_keep = "http_proxy ftp_proxy"

Defaults        env_reset