 Solution - aengusjiang  ···

问题：

I follow the document, then check sshd_config,
uncomment“HostKey /etc/ssh/ssh_host_ecdsa_key”

maybe need add the key algorithms:

#HostKeyAlgorithms ssh-ed25519[Redacted]@[Redacted]rsa-sha2-256,rsa-sha2-512
HostKeyAlgorithms ssh-ed25519[Redacted]@[Redacted]rsa-sha2-256,rsa-sha2-512,ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
#PubkeyAcceptedKeyTypes ssh-ed25519[Redacted]@[Redacted]rsa-sha2-256,rsa-sha2-512
PubkeyAcceptedKeyTypes ssh-ed25519[Redacted]@[Redacted]rsa-sha2-256,rsa-sha2-512,ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521

如果还是不行，参考官方文档，确定sshd_config的配置，主要是ecdsa算法

refer to the documentation and try following:

1. Open putty and connect to the Linux machine using the root user to verify that you can connect successfully. (My result: putty.png)
2. Connect to the machine via putty with a username that requires user authentication, run the command “ssh -Q cipher; ssh -Q mac; ssh -Q kex; ssh -Q key” and check that the output contains “ecdsa-sha2-nistp256, ecdsa-sha2-nistp384, ecdsa-sha2-nistp521”.
3. Please refer to the documentation to set up your Linux machine, connect to the Linux machine in VS using a username that requires user authentication and verify that you can connect successfully