rvm的使用笔记

感觉rvm是一个非常实用的工具能管理纷繁杂乱的版本问题：

$ rvm gemset use rails3   #切换gem环境
rvm use 1.9.3@rails3213 --default #设置默认
rvm gemset list   #显示所有gem环境
rvm list know #显示服务器端可用的版本
rvm help gemset #显示帮助

为莫个目录设在特定的版本信息：

shouyong@shouyong-desktop:~/redmine/ruby$ ll .ruby*
-rw-rw-r-- 1 shouyong shouyong 9 12月 29 14:01 .ruby-gemset
-rw-rw-r-- 1 shouyong shouyong 6 12月 29 13:59 .ruby-version
shouyong@shouyong-desktop:~/redmine/ruby$ cat .ruby-version 
1.9.3
shouyong@shouyong-desktop:~/redmine/ruby$ cat .ruby-gemset
rails326
shouyong@shouyong-desktop:~/redmine/ruby$ rvm gemset list

gemsets for ruby-1.9.3-p484 (found in /home/shouyong/.rvm/gems/ruby-1.9.3-p484)
   (default)
   global
   rails3213
=> rails326

shouyong@shouyong-desktop:~/redmine/ruby$

RVM is not a function, selecting rubies with 'rvm use ...' will not work.

When you run a rvm command such as

$ rvm use 1.9.3

but receive an error message of

RVM is not a function, selecting rubies with 'rvm use ...' will not work.

This error happens because under RVM's installation directory(normally $HOME/.rvm/bin), there is an executable named'rvm'; whereas under $HOME/.rvm/scripts directory, there isa script called 'rvm'.By default, the 'rvm' executable is used,which cannot handle many rvm commands such as 'rvmuse'. 

One should load RVM into a shell session as a function (runthe 'rvm' script). To do that, add thefollowing line to '~/.bash_profile':

[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" #load RVM into a shell session as a function



PATH=$PATH:$HOME/.rvm/bin #Add RVM to PATH for scripting

Open a new terminal or run the following command to reload/.bash_profile in the current terminal. The problem should besolved.

$ source ~/.bash_profile

原文：http://blog.sina.com.cn/s/blog_9d6e035501010lol.html