SSH keys audit (buckyverse.org)

What’s on your machine (local audit)

You have several key pairs. The one named r26d is a likely match for r26d@buckyverse.org:

Key pair	Comment	Your config
`~/.ssh/id_ed25519`	brett@r26d.com	Default for all hosts (`IdentityFile` in `Host *`)
`~/.ssh/id_rsa_r26d_2048`	brett@r26d.com	Not used by default — add a `Host` for buckyverse to use it
`~/.ssh/id_rsa`	belmendo@3B-MBP.local	Not default

If the server was set up with id_rsa_r26d_2048.pub, your client may be offering id_ed25519 first and the server rejects it (“public key missing”). Force the client to use the r26d key for buckyverse by adding this to ~/.ssh/config:

Host buckyverse.org
  HostName buckyverse.org
  User r26d
  IdentityFile ~/.ssh/id_rsa_r26d_2048
  IdentitiesOnly yes

Then connect with:

ssh buckyverse.org

If you prefer to try the ed25519 key on the server, use this instead:

Host buckyverse.org
  HostName buckyverse.org
  User r26d
  IdentityFile ~/.ssh/id_ed25519
  IdentitiesOnly yes

“Public key is missing” — what it usually means

Server side: The key your client is offering is not in the server’s ~/.ssh/authorized_keys (for user r26d).
Fix: Add the correct public key to the server (see below). No private key is ever put on the server.

Auditing keys on the server (once you have access)

If you can log in (e.g. DigitalOcean web console, or password, or another key):

See which keys are authorized for r26d:
```
cat ~/.ssh/authorized_keys
```
Compare with your local public keys (run on your Mac):
```
cat ~/.ssh/id_ed25519.pub
cat ~/.ssh/id_rsa_r26d_2048.pub
```
One of those lines should appear in authorized_keys. If neither does, add one (see below).

Permissions (on server):

chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

Adding your public key to the server

From your Mac, copy the key you want the server to accept (e.g. ed25519):

cat ~/.ssh/id_ed25519.pub

Or the r26d key:

cat ~/.ssh/id_rsa_r26d_2048.pub

Then on the server (in a session you already have open):

# Append one line (paste the full line from the cat output)
mkdir -p ~/.ssh
echo 'PASTE_THE_FULL_PUBLIC_KEY_LINE_HERE' >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

Or from your Mac in one go (if you already have password or console access):

ssh-copy-id -i ~/.ssh/id_rsa_r26d_2048 r26d@buckyverse.org
# or
ssh-copy-id -i ~/.ssh/id_ed25519 r26d@buckyverse.org

If you’re locked out

Use DigitalOcean Droplet Console (in the DO dashboard: droplet → Access → Launch Droplet Console) to get a shell without SSH.
Then edit ~/.ssh/authorized_keys for user r26d and add one of your .pub key lines as above.

Quick reference: your public keys (for pasting into authorized_keys)

Ed25519 (default):

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMrs971Vb5F4+ITAIcc0UptqVq6nKCiNztUl91T0xy3p brett@r26d.com

RSA r26d 2048:

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAvUwADzX3mMMsYZbLob8wcxgzfRo5xwjdeoGN+aoq0EfdPhcvJqH771/SO/cP+mo7CXwHTiuweYdPwDmmCUI0D3PUmvIxU25ggBxY78tn/BGgniOLWnXuFbnSLe3QQlwdvM0yqFAGuFIO5tMq4IZkA2TrsYGeP01zEsj+EXBtrEky5gw5p4bFsmjZ0WUC3oiSiWDmlAdx6hapoHO8xHeibWdALoW/jOHUO3TZg1wD5nuyDNtlBRBU9kc+RdBQ3BGocnffnuN9WS7EPHJMqnWHVqDQY8wnu8qfzsavoB76vI/Hw4d9F2Hz7/QipSrfLtmx1BVt/cPJRQ2siDEFkUMvew== brett@r26d.com

Only one of these needs to be in the server’s authorized_keys; then use the matching IdentityFile in your Host buckyverse.org block.