ssh · keygen
Generate an ed25519 SSH key.
1 · Your key
Two files are written: that path (private) and the same name + .pub (public).
2 · Run this
Press Enter twice when it asks for a passphrase — leave it empty.
3 · Show your public key
Send the .pub file — or the text it contains — to whoever administers the server. Email, chat, whatever.
Never send or copy the private key file, the one without
.pub. That one stays on your machine.