To resolve the issue of "No supported authentication methods available (server sent: publickey)" with FireZilla, I was able to solve it by modifying the SSH daemon configuration on the server. Here's what worked for me:

Open the SSH daemon configuration file, typically located at

"/etc/ssh/sshd_config"

Add or modify the following lines:

"

PubkeyAuthentication yes

PubkeyAcceptedKeyTypes=+ssh-rsa

"

Save the changes and restart the SSH service using:

"sudo systemctl restart sshd"

This ensures that public key authentication is enabled and that ssh-rsa is explicitly accepted as a key type, resolving compatibility issues that could arise due to key type restrictions. I hope this helps anyone facing similar issues!

Thanks me later !!