SSH免密登录
添加hosts
在/etc/hosts文件中添加对应主机地址已经名称:
10.5.16.1 node1
10.5.16.2 node2
10.5.16.3 node3
10.5.16.4 node4
10.5.16.5 node5
10.5.16.6 node6
生成key
在node1服务器执行:
ssh-keygen -t rsa
提示输入一些信息，默认即可:
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Created directory '/root/.ssh'.
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:
SHA256:xOkgW2P4IcB4epLE2H8UZywgtm/xoLUHaroqVJuoeXY root@sugon51601
The key's randomart image is:
+---[RSA 2048]----+
|o++ ...oo |
|o+++ .o+.. |
|.+..O.*.+ |
|+ .*.&.* |
| o* B.+ S |
| = + . |
|+. |
|+.o E |
|=o . |
+----[SHA256]-----+
然后使用以下命令将公钥拷贝到其他服务器:
ssh-copy-id node2
提示输入node2服务器的密码:
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host 'node2 (10.5.16.2)' can't be established.
ECDSA key fingerprint is SHA256:b3KWX6G6H7ANx8tNzhobL9su6YnmT55aGSpg3xlO4xY.
ECDSA key fingerprint is MD5:25:03:35:34:e0:e7:70:2b:0b:65:87:71:c6:50:36:60.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@node2's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'node2'"
and check to make sure that only the key(s) you wanted were added
问题
如生成密钥时提示权限不足可修改/etc/ssh/ssh_config文件的配置(centos系统)：
PermitRootLogin yes
PubkeyAuthentication yes
PasswordAuthentication yes
参考地址：