用Rvm安装Ruby，Rails运行环境及常见错误解决方法

一.安装Rvm

1.下载安装Rvm

$ curl -L https://get.rvm.io | bash -s stable

此时可能出现错误：“gpg: 无法检查签名：找不到公钥”

解决方法：

$ gpg --keyserver subkeys.pgp.net --recv 4F6C1E86      //下划线上应改为你所缺少的公钥
$ gpg --export --armor 4F6C1E86 | sudo apt-key add -      //下划线上应改为你所缺少的公钥

2.载入Rvm环境

$ source ~/.rvm/scripts/rvm

3.检查是否安装正确

$ rvm -v 
rvm 1.22.17 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]

二.用 RVM 安装 Ruby 环境

1.下载安装Ruby，Ruby Gems;

$ rvm install 2.0.0

2.将安装好的Ruby设置为系统默认版本

$ rvm 2.0.0 --default

此时可能出现错误：RVM is not a function, selecting rubies with 'rvm use ...' will not work.

You need to change your terminal emulator preferences to allow login shell.

Sometimes it is required to use `/bin/bash --login` as the command.

Please visit https://rvm.io/integration/gnome-terminal/ for an example.

解决方法：

$ bash --login

3.测试是否正确

$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin13.0.0]

$ gem -v
2.1.6

三.安装Bundler

$ gem install bundler

此时可能出现错误：

ERROR: Could not find a valid gem 'bundler' (>= 0), here is why: Unable to download data from https://rubygems.org/ - Errno::ETIMEDOUT: Connection timed out - connect(2) (https://rubygems.org/latest_specs.4.8.gz)

解决方法：

$ gem sources --remove https://rubygems.org/
https://rubygems.org/ removed from sources

$ gem sources -a https://ruby.taobao.org/
https://ruby.taobao.org/ added to sources

$ gem sources -l
*** CURRENT SOURCES ***

https://ruby.taobao.org/

四. 安装Rails环境

1.安装Rails

$ gem install rails

2.检查是否正确

$ rails -v
Rails 3.2.13

**********声明：根据个人系统初始配置的不同，解决错误的方法也不尽相同，以上方法仅供参考**********

转载自本人ITeye链接：http://xiaozhuang0706.iteye.com/blog/2256879