Ruby：安装rvm的时候报错
OS:Kali
Ruby:1.9.3p194 (2012-04-20 revision 35410) [i486-linux
参考这篇文章进行rvm的安装，其中在执行第3步的时候（cat ins|bash -s stable）报错如下：
......省略
Upgrading the RVM installation in /usr/local/rvm/
cp: 无法获取"/usr/local/rvm/src/rvm/bin/rake" 的文件状态(stat): 没有那个文件或目录
cp: 无法获取"/usr/local/rvm/src/rvm/bin/bundle" 的文件状态(stat): 没有那个文件或目录
Upgrade of RVM in /usr/local/rvm/ is complete.
# Administrator,
#
# Thank you for using RVM!
# We sincerely hope that RVM helps to make your life easier and more enjoyable!!!
#
# ~Wayne, Michal & team.
In case of problems: http://rvm.io/help and https://twitter.com/rvm_io
Upgrade Notes:
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