知識點048-ssh中如何快速鏈接主機名

知識儲備

瞭解無密鑰如何配置

關於~/.ssh/config

該文件若是沒有，則手工建立

最後達到的效果

• 以前

$ ssh user@hostname -p port

• 以後

$ ssh rab1

如何操做

[root@rabbitmq .ssh]# ssh rab1
Last login: Fri May 17 22:11:40 2019 from 192.168.52.53
[root@localhost ~]# logout
Connection to 192.168.52.54 closed.
[root@rabbitmq .ssh]# ssh rab2
Last login: Fri May 17 21:47:21 2019 from 192.168.52.1
[root@localhost ~]# logout
Connection to 192.168.52.55 closed.
[root@rabbitmq .ssh]# cat config 
Host rab1
    HostName 192.168.52.54
    Port 22
    IdentityFile ~/.ssh/id_rsa	
Host rab2
    HostName 192.168.52.55
    Port 22
    IdentityFile ~/.ssh/id_rsa
[root@rabbitmq .ssh]# ll
total 20
-rw-------. 1 root root  790 May 17 20:04 authorized_keys
-rw-r--r--. 1 root root  161 May 17 22:13 config
-rw-------. 1 root root 1679 May 17 20:01 id_rsa
-rw-r--r--. 1 root root  395 May 17 20:01 id_rsa.pub
-rw-r--r--. 1 root root  350 May 17 22:01 known_hosts