安装到rvm是卡壳
接下来该如何操作

xxx@ubuntu:~$ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
gpg: directory `/home/zhouhang/.gnupg' created
gpg: new configuration file `/home/zhouhang/.gnupg/gpg.conf' created
gpg: WARNING: options in `/home/zhouhang/.gnupg/gpg.conf' are not yet active during this run
gpg: keyring `/home/zhouhang/.gnupg/secring.gpg' created
gpg: keyring `/home/zhouhang/.gnupg/pubring.gpg' created
gpg: requesting key D39DC0E3 from hkp server keys.gnupg.net
gpg: /home/zhouhang/.gnupg/trustdb.gpg: trustdb created
gpg: key D39DC0E3: public key "Michal Papis (RVM signing) <mpapis@gmail.com>" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)

xxx@ubuntu:~$ \curl -sSL https://get.rvm.io | bash -s stable
curl: (7) Failed to connect to get.rvm.io port 443: Connection refused
xxx@ubuntu:~$ \curl -sSL https://get.rvm.io | bash -s stable
curl: (35) gnutls_handshake() failed: Error in the pull function.