xshell利用谷歌二次登录

 yum -y install gcc make pam-devel libpng-devel libtool wget git
 ll
 cd
 yum install mercurial
 cd /ebsig/software/
 git clone https://github.com/google/google-authenticator-libpam.git
 cd google-authenticator-libpam/
 ls
 ./bootstrap.sh
 make
 ./configure
 make
 make install
 cp /usr/local/lib/security/pam_google_authenticator.so /lib64/security/
 vim /etc/pam.d/sshd

 vim /etc/ssh/sshd_config

ChallengeResponseAuthentication yes   #把no改为yes
 service sshd restart
 google-authenticator    #运行该命令生成公钥和二维码

手机客户端扫描二维码或是输入公钥即可，然后以下一直选择y

 配置xshell客户端

参考百度链接地址:http://jingyan.baidu.com/article/8ebacdf005f31149f75cd563.html