Linux服务器配置秘钥对连接

[root@check2 ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):   #回车即可
Enter passphrase (empty for no passphrase):     #回车即可
Enter same passphrase again:     #回车即可
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:
3e:78:02:ef:b6:84:62:8e:52:4a:aa:39:64:cb:a1:96 root@check2
The key's randomart image is:
+--[ RSA 2048]----+
|                 |
|                 |
|                 |
|                 |
|   .  S          |
|  =.  +  o       |
|Bo*  .  =  +     |
|*E .  o.o  .     |
|B..   .o.        |
+-----------------+
[root@check2 ~]# cd .ssh/
[root@check2 .ssh]# cat id_rsa.pub >> authorized_keys
[root@check2 .ssh]# chmod 600 authorized_keys
[root@check2 .ssh]# chmod 700 ~/.ssh

编辑sshd配置文件

[root@check2 .ssh]# vim /etc/ssh/sshd_config 
 47 RSAAuthentication yes
 48 PubkeyAuthentication yes
 42 PermitRootLogin yes
 61 IgnoreRhosts yes
 66 PasswordAuthentication no
 122 UseDNS no

[root@check2 .ssh]# service sshd restart
停止 sshd：                [确定]
正在启动 sshd：             [确定]

[root@check2 .ssh]# sz id_rsa

导出后将id_rsa改个名字，然后导入Xshell

打开Xshell，使用快捷键 Alt+T+U（alt键按着不松，依次按T，U）

导入刚才的文件

登录远程机器

选择刚才导入的文件确定即可