什么问题？

@huacnlee

wiki中的 rvm 的安装方式似乎失效了

$ curl -L https://get.rvm.io | bash -s stable
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   184  100   184    0     0    106      0  0:00:01  0:00:01 --:--:--   190
100 22721  100 22721    0     0   9823      0  0:00:02  0:00:02 --:--:--  9823
Downloading https://github.com/rvm/rvm/archive/1.26.11.tar.gz
Downloading https://github.com/rvm/rvm/releases/download/1.26.11/1.26.11.tar.gz.asc
gpg: directory `/home/xxx/.gnupg' created
gpg: new configuration file `/home/xxx/.gnupg/gpg.conf' created
gpg: WARNING: options in `/home/xxx/.gnupg/gpg.conf' are not yet active during this run
gpg: keyring `/home/xxx/.gnupg/pubring.gpg' created
gpg: Signature made Tue 31 Mar 2015 05:52:13 AM CST using RSA key ID BF04FF17
gpg: Can't check signature: public key not found
Warning, RVM 1.26.0 introduces signed releases and automated check of signatures when GPG software found.
Assuming you trust Michal Papis import the mpapis public key (downloading the signatures).

GPG signature verification failed for '/home/xxx/.rvm/archives/rvm-1.26.11.tgz' - 'https://github.com/rvm/rvm/releases/download/1.26.11/1.26.11.tar.gz.asc'!
try downloading the signatures:

    sudo gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

rvm 官网上的安装步骤的第一步里也提到，需要先执行：

$ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

然后再

$ curl -L https://get.rvm.io | bash -s stable

有高手能解释一下那个 gpg 吗……倒是成功了，但不太明白啊……