Background: SecureCRT's SSH normal use, the sudden appearance:
Key exchange failed。
No compatible hostkey.The server supports these methods:
RSA, rsa-sha2-512, rsa-sha2-256, ecdsa-sha2-nistp256, ssh-ed25519
Solving steps:
1. First, restart the server sshd: service sshd restart
2. Delete the file secureCRT of SSH2.ini
3. Restart secureCRT
4. return to normal
Note: The reference methods for online failed to recover, these operations do is toss themselves, work is not clear what step, step by step we can try both.