解决了前些天安装ROR环境时候的一个遗留问题

前写天安装ROR环境的时候，重启系统开启一个shell使用命令

rails -v

显示rails尚未安装

但是安装aptana之后在aptana里面打开控制台就可以正常显示版本，应该是aptana自动加载了路径和函数吧

昨天看《RailsStutorial2》里面推荐了https://github.com/perfectionist/sample_project/wiki的开发简例

正好里面有较为详细的环境配置教程（比国内那些配置教程有用的信息要多的多）就发现了加载路径和函数的方法：

Setup PATH and define rvm function.
To use rvm just type

source ~/.rvm/scripts/rvm

into open shells, this creates the rvm function and adds various ~/.rvm/... directories to PATH.
You can also add this line to your ~/.bashrc file so it takes affect for all new shells.
I was going to use a slightly different approach so I defined an alias

use_rvm='source ~/.rvm/scripts/rvm'

and then invoked it when I needed to use rvm from the command line.

But I decided to install the following line in my .bash_profile

-s "$HOME/.rvm/scripts/rvm" && source "$HOME/.rvm/scripts/rvm"

You can add the line to your .bash_profile or .bashrc file depending how you set your environment up. This defines the rvmfunction and modifies your PATH only if the the ~/.rvm/scripts/rvm file exists. This is preferable to just adding the source statement.

推荐第一种方法，即使多开几个shells也都是可以的，不过现在使用的RubyMine IDE这些问题都不存在，但是，有问题了还是解决了比较安心，呵呵~~~~~~

补充：升级最新版的rvm好像能直接自动添加了~~~~~

rvm update

来源：oschina

链接：https://my.oschina.net/u/1045481/blog/195488