一、目的

在OBD页面上部署OceanBase数据库时发现，需要把新用户也要配置ssh免密登录

二、前提

root用户已经设置免密登录

三、配置步骤

1 切换到新用户obadmin

[root@hurys23 ~]# su obadmin

2 执行命令生成秘钥文件

[obadmin@hurys23 oceanbase]$ ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (/home/obadmin/.ssh/id_rsa): 
Created directory '/home/obadmin/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/obadmin/.ssh/id_rsa.
Your public key has been saved in /home/obadmin/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:0TzF7vULQ7VDezb0YMfv1livDYSrYGX5TmwyLkc1wKM obadmin@hurys23
The key's randomart image is:
+---[RSA 2048]----+
|         . ..  . |
|         o+.. o+o|
|        ..+= o+o=|
|        E.+.=.o=*|
|        So =.= **|
|        o + Boo *|
|       . + B  o=.|
|        . + . ...|
|         o       |
+----[SHA256]-----+

3 拷贝秘钥和公钥文件

[obadmin@hurys23 oceanbase]$ ssh-copy-id hurys23

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/obadmin/.ssh/id_rsa.pub"
The authenticity of host 'hurys23 (fe80::65e8:aec4:9ddc:391%eth0)' can't be established.
ECDSA key fingerprint is SHA256:IFDybf4yMAmrmyYChuoTtXI6vaRv8KwBYR4pdKiV2XI.
ECDSA key fingerprint is MD5:eb:33:8f:ef:9c:8f:e2:93:9a:85:2f:4e:7e:69:d5:51.
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
obadmin@hurys23's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'hurys23'"
and check to make sure that only the key(s) you wanted were added.
 

这样新用户就配置ssh免密登录，后面就是在在OBD页面上部署OceanBase数据库