我想我有一个非常愚蠢的问题，但即使我在问你，因为这让我很恼火，而且我是 ruby on rails 的新手，也是 linux ubuntu 的新手。在安装 ruby 1.9.3（rvm install 1.9.3）时，我收到了我粘贴在下面的这个错误。我没有从这个错误中得到任何线索。我用谷歌搜索了很多，但无法解决这个问题，所以请帮助我并详细说明这个错误到底是什么？我什至去过那条路，但那里什么都没有（usr/share/ruby-rvm/log/ruby-1.9.3-p448）
~$ rvm install 1.9.3
Installing Ruby from source to: /usr/share/ruby-rvm/rubies/ruby-1.9.3-p448, this may take a while depending on your cpu(s)...
ruby-1.9.3-p448 - #fetching
ruby-1.9.3-p448 - #downloading ruby-1.9.3-p448, this may take a while depending on your connection...
curl: (3) <url> malformed
ERROR: There was an error, please check /usr/share/ruby-rvm/log/ruby-1.9.3-p448/*.log. Next we'll try to fetch via http.
Trying http:// URL instead.
curl: (3) <url> malformed
ERROR: There was an error, please check /usr/share/ruby-rvm/log/ruby-1.9.3-p448/*.log
ERROR: There has been an error while trying to fetch the source.
Halting the installation.
ERROR: There has been an error fetching the ruby interpreter. Halting the installation.