1.16 linux机器相互登陆

生成密钥

1. 在机器一上

 命令：ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
c3:b9:63:72:1c:80:85:f5:75:91:51:0f:a0:a8:e0:87 root@suning-01
The key's randomart image is:
+--[ RSA 2048]----+
|     oo   . =*o  |
|    .o . o o.  o |
|    o . o .     .|
|   . o + .       |
|    E o S        |
|     . . +       |
|      . *        |
|       + .       |
|                 |
+-----------------+
命令 ls /root/.ssh/
authorized_keys  id_rsa  id_rsa.pub
#其中id_rsa.pub是公钥
命令：cat /root/.ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCa3Z+I2evvNyO5vl6Izh15L8R1cVkDmjYFqt2a/Aazq6ogWGkxSChXc46aDUHGkjJnMtjZHe5cuSKXOhYBBxbhak1dFS248R4DsH4BAWHb2AeIIKIwEc/XXRfPpTK97YQ2yllGN+gdfPa/l5nR9e6FySKXSWfrgZ34I6DLQGeHndkAykjRZmp9mU20XO3KJYRm6WezLWI2y7/OQuktRw/R7qalg3fiZHFly5A8SPl87fZ7Rioyqzf5IQxQfpHeBGnrCRLN3pKKAYAUG2PHJZO2634vMjfG4HilBJzys1WAI6O5mkRrht/1haAjODRgMqdCOxO+72wBtyZ5BzSY+Xir root@suning-01

2. 在另外一台机器上



 vim /root/.ssh/authorized_keys
 #将上方的.pub文件内容粘贴到authorized_keys中

关闭防火墙

1. 查看防火墙状态

$  getenforce

Enforcing :表示启用

$ setenforce 0

$ getenforce

Permissive：表示关闭防火墙

登陆格式

ssh -p 22 root@192.168.139.138

再次登陆时，不再需要输入密码