在Ubuntu 14.04上安装带有RVM的Ruby 2.2.2时出错

这是什么.
我先做了：

rvm get stable
rvm install ruby-2.2.2

没有成交.它向我展示了以下内容：

$rvm install ruby-2.2.2
Searching for binary rubies,this might take some time.
No binary rubies available for: ubuntu/14.04/i386/ruby-2.2.2.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for ubuntu.
Requirements installation successful.
Installing Ruby from source to: /home/myuser/.rvm/rubies/ruby-2.2.2,this may take a while depending on your cpu(s)...
ruby-2.2.2 - #downloading ruby-2.2.2,this may take a while depending on your connection...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:00:19 --:--:--     0Warning: Transient problem: timeout Will retry in 2 seconds. 3 retries left.
  0     0    0     0    0     0      0      0 --:--:--  0:00:19 --:--:--     0Warning: Transient problem: timeout Will retry in 2 seconds. 2 retries left.
  0     0    0     0    0     0      0      0 --:--:--  0:00:19 --:--:--     0Warning: Transient problem: timeout Will retry in 2 seconds. 1 retries left.
  0     0    0     0    0     0      0      0 --:--:--  0:00:19 --:--:--     0curl: (6) Could not resolve host: cache.ruby-lang.org
There was an error(6).
Checking fallback: http://ftp.ruby-lang.org/pub/ruby/2.2/ruby-2.2.2.tar.bz2
Checking fallback: http://www.mirrorservice.org/sites/ftp.ruby-lang.org/pub/ruby/2.2/ruby-2.2.2.tar.bz2
No fallback URL could be found,try increasing timeout with:

    echo "export rvm_max_time_flag=20" >> ~/.rvmrc

There has been an error fetching the ruby interpreter. Halting the installation.

我告诉你增加超时时间：

echo "export rvm_max_time_flag=20" >> ~/.rvmrc

但没有交易.我也做了rvm得到了头并且在更高的超时时间重新做了但是它仍然没有好处.

我该怎么做才能在ubuntu上正确安装ruby-2.2.2？

我更改了PC的网络,Virtual Box VM没有更新或连接到新网络.为了解决这个问题,没有一个命令(rvm得到稳定; rvm get head; rvm install ruby-2.2.2)引发了一个警告,所以我被认为是别的东西.

“错误绝不应该默默无闻.” (Python的禅宗)

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