我正在尝试使用 RVM 设置 Ruby 1.9.3-p392。我收到以下错误：-
Searching for binary rubies, this might take some time.
ruby-1.9.3-p392 - #configure
ruby-1.9.3-p392 - #download
There is no checksum for 'https://rvm.io/binaries/ubuntu/12.04/i386/ruby-1.9.3-p392.tar.bz2?rvm=1.18.3' or 'bin-ruby-1.9.3-p392.tar.bz2', it's not possible to validate it.
If you wish to continue with unverified download add '--verify-downloads 1' after the command.
Downloading https://rvm.io/binaries/ubuntu/12.04/i386/ruby-1.9.3-p392.tar.bz2 failed.
Mounting remote ruby failed, trying to compile.
Installing Ruby from source to: /home/krishna/.rvm/rubies/ruby-1.9.3-p392, this may take a while depending on your cpu(s)...
ruby-1.9.3-p392 - #downloading ruby-1.9.3-p392, this may take a while depending on your connection...
There is no checksum for 'http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p392.tar.bz2' or 'ruby-1.9.3-p392.tar.bz2', it's not possible to validate it.
If you wish to continue with unverified download add '--verify-downloads 1' after the command.
There has been an error fetching the ruby interpreter. Halting the installation.
查看上述错误消息，我认为进行未经验证的下载并不安全。谁能告诉我如何使用 RVM 以正确的方式安装它？
谢谢你。