How do I list available host key algorithms for an SSH client?
ssh -Q key
Unless you have an ancient version of OpenSSH, in which case uhhhh source dive, or run ssh -v -v -v ...
and see if what you want appears there.
from the ssh_config manual
page:
HostKeyAlgorithms
Specifies the protocol version 2 host key algorithms that the client wants to use in order of preference. The default for this option is:
[email protected],
[email protected],
[email protected],
[email protected],[email protected],
[email protected],[email protected],
ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
ssh-rsa,ssh-dss
If hostkeys are known for the destination host then this default is modified to prefer their algorithms.