Xshell's ssh server rejected the password, failed to skip publickey authentication, and did not register with the server

XShell and SSH A series of questions about

• Today, I encountered a little episode while helping with the network topology , A normal server can use users and passwords Xshell Connected , But today, after entering the user name and password , Always jump out and upload publickey The interface of , Can't go around , And it often shows that the host is not registered with the server after uploading
• The preliminary judgment is server Of ssh Problems setting up the
• A big change , Include ssh-key -t rsa Wait for a lot of , Later, it was suspected that windows The key generation problem here , I used it specially Xshell The built-in generation 2048 The public key , It's no use

Solution

• Because you can't log in with a password , Just check ssh Of config file , Usually in /etc/ssh Under the sshd_config, Note that sshd_config, No ssh_config, however Set some default settings to yes Later, I found that it was still not good , Show SSH The server rejected the password , The problem is still unsolved
• For a long time , Suddenly thought of config Statement coverage , The post setting statement can override the pre setting statement , For example, it states a=1 Then it was declared on the last line a=2,a The value of will be overwritten , Sure enough, there are repeated statements in the last few lines , Finally, just change it all

Experience

Later change config Such configuration files , Don't find relevant keywords, modify them directly and then close , Suggest or use vim Of / Search for complete strings , In case someone adds a covering statement later , No matter how you change it in front of you