Human readable .ssh/known_hosts?

Martin Drescher drescher at
Tue Sep 29 20:58:01 AEST 2020

On 29.09.20 12:44, Damien Miller wrote:
> On Tue, 29 Sep 2020, Martin Drescher wrote:
>> Hi list members,
[...]> You can however find and delete hosts by name using ssh-keygen.
> To find entries matching a hostname, use "ssh-keygen -F hostname", e.g.

The point is, file has over 600 hashes stored.

> $ ssh-keygen -lF
> # Host found: line 146 
> ECDSA SHA256:xjGrsgS6JzMojD3go1qULmh02LG8YpRirOwmoHnT/3M
> # Host found: line 165 
> # Host found: line 166 
> ED25519 SHA256:43S30LGUkc2f9dDcLZG6O5KPKtPn7Xw2WkR2vCO/nnU
> (the -l flag tells it to print fingerprints instead of full keys)
> You can also delete entries using "ssh-keygen -R hostname".
> -d

At this point, my best practice would possibly be, to start with an empty known host and build a new one from all hosts in my .ssh/config.

How would a 'lasst_seen' column in known_hosts be a nice feature? I'm not sure.



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