What is the "/etc/ssh/ssh_host_ed25519_key" key?

Question

SSH

Where exactly did this name come from?
I tried to google, but all that was - "oh, I don't have this key, what should I do."
And I'm interested in what kind of key it is, why it is needed and why such a name.

Answer 1

I tried to google, but all that was - "oh, I don't have this key, what should I do."

I seem to have a more advanced Google :)

It's a new type of key that's been added to the latest OpenSSH. The ED25519 host key should be automatically generated the first time sshd(8) is started. Generation of the hosts keys is done in the /etc/rc.d/sshd start script.

Answer 2

Why is a cat called a cat? This is just such a type of key, just like DSA, RSA, ECDSA ... It is created during the generation of keys for OpenSSH, it may not be created, for example, I generated it manually. Not particularly needed.

Answer 3

Move it to another directory, it won't get worse, you'll find out what fell off in the process.