免密码登录

 ssh-keygen -t rsaGenerating public/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa): keyEnter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in key.Your public key has been saved in key.pub.The key fingerprint is:3d:6d:ab:de:0e:22:d7:bc:1d:00:42:e3:22:ee:e9:a5 root@node02The key's randomart image is:+--[ RSA 2048]----+|      o          ||     o .         ||  . . o .        || . . . . o .     ||  .     S + o    || . .     o + .   ||  o . . o + o    || . o   o . * .   ||  E      .+.+    |+-----------------+

 lskey  key.pub

 cat key.pub >> /root/.ssh/authorized_keys

 chmod 600 authorized_keys

 Connecting to 192.168.6.7:22...Connection established.To escape to local shell, press 'Ctrl+Alt+]'.Last login: Tue Apr 11 23:08:36 2017 from 192.168.6.1[root@node ~]#