When connecting to a new/unknown server (with recent OpenSSH), for example:

```
ssh example.com

```

You get the fingerprint like below:

```
The authenticity of host 'example.org (192.0.2.42)' can't be established.
RSA key fingerprint is SHA256:7KMZvJiITZ+HbOyqjNPV5AeC5As2GSZES5baxy1NIe4.
Are you sure you want to continue connecting (yes/no)?

```

However, fingerprints are usually given for the server in this form:

```
f6:fc:1c:03:17:5f:67:4f:1f:0b:50:5a:9f:f9:30:e5

```

How can I check the authenticity (without bugging the server admins to provide an SHA256 fingerprint)?