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CentOS7做ssh免密登录

IT知识免密登录centos7

愿君学长松，慎勿作桃李。这篇文章主要讲述CentOS7做ssh免密登录相关的知识，希望能为你提供帮助。
两台CentOS7：
youxi1192.168.2.103
youxi2192.168.2.104


[root@localhost ~]# ssh-keygen -t rsa
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:s3UfKpok75/reD0KNwOi/M2nonkALSVbXr1foBG7rB0 root@localhost.localdomain
The key\'s randomart image is:
+---[RSA 2048]----+
|       ...       |
|   . o . o..       |
|   B .   .+ .     |
|   + o   .o.   .     |
|   o   . E.... .   |
|   ... + *.. o . |
|     o.o = =.. .   |
|     oo* *o=o     |
|     oo.oX**o .   |
+----[SHA256]-----+
[root@localhost ~]# ls /root/.ssh/
id_rsa   id_rsa.pub
?接着使用命令ssh-copy-id命令将公钥发到192.168.2.104服务器上
?
?[root@localhost ~]#   ssh-copy-id -i .ssh/id_rsa.pub   root@192.168.2.104?/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: ".ssh/id_rsa.pub"


/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@192.168.2.104\'s password:  


Number of key(s) added: 1


Now try logging into the machine, with:   "ssh \'root@192.168.2.104\'"
and check to make sure that only the key(s) you wanted were added.?
?
?[root@localhost ~]# ssh root@192.168.2.104Last login: Mon Oct   4 01:20:33 2021 from 192.168.2.103
[root@localhost ~]# ip addr
?1: lo: < LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
      valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host  
      valid_lft forever preferred_lft forever
2: ens33: < BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:55:b1:20 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.104/24 brd 192.168.2.255 scope global noprefixroute dynamic ens33
      valid_lft 6313sec preferred_lft 6313sec
    inet6 fe80::b92a:baa7:4873:a720/64 scope link tentative noprefixroute dadfailed  
      valid_lft forever preferred_lft forever
    inet6 fe80::90dc:b1a9:5062:45c1/64 scope link tentative noprefixroute dadfailed  
      valid_lft forever preferred_lft forever
    inet6 fe80::e3cb:dc5:77b8:7e6a/64 scope link noprefixroute  
      valid_lft forever preferred_lft forever
[root@localhost ~]# exit
登出
Connection to 192.168.2.104 closed.
[root@localhost ~]# 

?
【CentOS7做ssh免密登录】?


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