Use the key to log in to the Linux server

I used Xshell to generate the key and upload it to the Linux server.

 

Go to the tool tab bar and select [New User Key Generation Wizard]

 

 

 

Set the password for the key

 

 Finally, just save it as a file.

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Create a new .ssh folder in the user's home directory

[root @ localhost ~] # mkdir . SSH   # New .ssh folder 
[root @ localhost ~] # chmod  700 . SSH /   # only read and write access to their 
[root @ localhost ~] # cd. SSH   # into the .ssh folder

I used Xftp that comes with Xshell to upload the public key to the .ssh folder.

$ cat id_dsa_1024.pub > authorized_keys
$ chmod 600 authorized_keys

Modify sshd.config

[root@localhost .ssh]# vim /etc/ssh/sshd_config
修改如下
PasswordAuthentication no
PubkeyAuthentication yes
AuthorizedKeysFile  .ssh/authorized_keys

Restart sshd

[root@localhost .ssh]# systemctl restart sshd

 

When using Xshell again, the name of the public key is displayed directly. You also need to enter the password set for the public key.