Two-factor SSH authentication via Google secures Linux logins

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http://www.techrepublic.com/blog/opensource/two-factor-ssh-authentication-via-google-secures-linux-logins/2607

刚刚给LastPass开通了Google Authenticator集成，现在总算是觉得比较靠谱了 :)
顺便搜了一下，发现主机的ssh也可以集成它，真不错。