我在 Linux 下面安装 Ruby 时候碰到了无法连接到主机的问题，请问可以通过替换地址啥的莱解决吗？
ruby-1.9.2-p318 - #fetching ruby-1.9.2-p318 - #downloading ruby-1.9.2-p318, this may take a while depending on your connection...
curl: (7) couldn't connect to host There was an error, please check /home/jwu/.rvm/log//*.log. Next we'll try to fetch via http. Trying ftp:// URL instead.
curl: (7) couldn't connect to host
There was an error, please check /home/jwu/.rvm/log//*.log
There has been an error while trying to fetch the source.
Halting the installation.
There has been an error fetching the ruby interpreter. Halting the installation.
_why
#1
2012年03月10日
我已通过 apt 将 ruby 和 gem 装上了，但貌似得升级，我去搜搜该怎么升级
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux] $ gem -v 1.3.5
