Open the server → SSH Keys tab.

This lists the public keys authorized to log in to the server, each with its name and fingerprint.

Add or remove a key

Click Add Key and pick one or more keys from your account-wide SSH key library; keys already on the server aren't offered again. The trash icon removes a key from this server only — it stays in your library and on any other server that uses it.

When the change takes effect

In practice that means:

  • Adding access now? Add the key here so it survives the next rebuild, and append it to ~/.ssh/authorized_keys over SSH so it works today.
  • Revoking access? Removing it here isn't enough. Delete it from ~/.ssh/authorized_keys on the live system too, or the person keeps their access.