Centos5.8的SSH配置

一、环境配置
 
1、服务端：CentOS release 5.8  IP：192.168.1.111
 
2、客服端：CentOS release 5.8  IP：192.168.1.110
 
二、配置SSH无密码登录需要3步：
 1、生成公钥和私钥
 2、导入公钥到认证文件,更改权限

 3、测试

三、配置公钥与私钥

1.服务端生成公钥与私钥

[oracle@asm ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa): #回车（代表无需密码登陆）
Created directory '/home/oracle/.ssh'.
Enter passphrase (empty for no passphrase): #回车
Enter same passphrase again: #回车
Your identification has been saved in /home/oracle/.ssh/id_rsa.#代表私钥
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.#代表公钥
The key fingerprint is:
59:0d:c0:b2:89:98:f0:bc:f7:6d:8f:21:69:c3:57:84 oracle@asm

2.查看公钥与私钥

[oracle@asm ~]$ cd /home/oracle/.ssh/
[oracle@asm .ssh]$ ls
id_rsa  id_rsa.pub  known_hosts

3. 客户端也要进行相应的配置，进行两台服务器的双向连接，再与不进行演示了

4.把服务端的公钥拷贝到客户端的~/.ssh/目录下，并命名为authorized_keys

[oracle@asm .ssh]$ scp -r id_rsa.pub [email protected]://home/oracle/.ssh/authorized_keys
[email protected]'s password: 
id_rsa.pub  

5.把客户端的公钥拷贝到服务端的~/.ssh/目录下，并命名为authorized_keys，进行两台服务器的双向连接，再与不进行演示了

6.分别修改服务端和客户端相应目录的权限

 [oracle@asm ~]#chmod 700 ~/.ssh
 [oracle@asm ~]#chmod 600 ~/.ssh/authorized_keys

7.分别重启服务端和客户端的ssh服务，root角色

[root@asm ~]# service sshd restart
Stopping sshd:                                             [  OK  ]
Starting sshd:                                             [  OK  ]

8.测试两台机器之间传输文件不需要密码

服务端到客户端传输文件不需要密码

[oracle@asm tmp]$ touch test.oracle
[oracle@asm tmp]$ scp test.oracle [email protected]://tmp
test.oracle                                   100%    0     0.0KB/s   00:00    

客户湍到服务端传输文件不需要密码

[oracle@asm tmp]$ scp test.oracle [email protected]://tmp
test.oracle                                   100%    0     0.0KB/s   00:00