Send remote file failed (scp)

The reason for this is that the previously saved key 192.168.210.134.

In that case the following steps:

① view hidden files

[root@localhost ~]# ls -a
    .ssh    

② switch to .ssh directory            
[the root @ localhost ~] # CD .ssh
[.ssh the root @ localhost] # LS
the known_hosts

③ the profile information 192.168.42.134 reserved omitted to
[the root @ localhost .ssh] # Vim the known_hosts
192.168.42.134 ECDSA-SHA2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBMp9XgZJZ2DdJOHnNPClxv4Kia / dKuH36 HIpxGxDrffaMWKK9wYWb64I5nhs + / + W = aTRN8oK7LjFYH8Jf38Nq3hc