ssh链接：
ssh root@192.168.1.250
ssh -p 22222 root@101.201.43.143
输入密码登陆
ssh不用收入密码建立密钥
1、生成秘钥
[root@localhost logs]# 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:
6b:45:21:25:cf:b2:0d:ac:cd:28:d6:1a:a2:32:82:41 root@localhost.localdomain
The key's randomart image is:
+--[ RSA 2048]----+
| o.o |
| . = . |
| E + + |
|. . = * |
|. . + + S o |
|.o o + o |
|* . o |
|o. . |
| |
+-----------------+
2、22号端口把秘钥发过去
[root@localhost logs]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.1.250
root@192.168.1.250's password:
3、非22号端口把秘钥发过去
[root@localhost logs]# ssh-copy-id -i ~/.ssh/id_rsa.pub '-p 22 root@11.11.11.11'
root@101.201.43.143's password:
4.ubuntu服务器
#ssh-copy-id root@11.11.11.1 -p 22
下次链接不用收入密码了！
有两个节点node1 node2，也可以是ip地址
1.在node1上生成公钥/私钥对
[hjf@node1 ~]$ ssh-keygen -t rsa12
敲3次回车在/home/hjf 目录下生成.ssh目录，里面有id_rsa，id_rsa.pub
2.把node1下的id_rsa.pub复制到node2下的.ssh/authorized_keys
[hjf@node1 ~]$ scp .ssh/id_rsa.pub hjf@node4:/home/hjf/id_rsa.pub hjf@node2's password: id_rsa.pub 100% 391 0.4KB/s 00:00 1234
第一次连接会输入一个密码，这里用scp复制
3.将node2中的id_rsa.pub追加到.ssh/authorized_keys里，并改变authorized_keys的权限600
[hjf@node2 ~]$ cat id_rsa.pub >>.ssh/authorized_keys [hjf@node2 ~]$ chmod 600 .ssh/authorized_keys123
4.node1 登陆node2
ssh hjf@node2
