Mac
mac ssh Unable to negotiate
enter to /etc/ssh/ssh_config
HostkeyAlgorithms +ssh-dss
KexAlgorithms +diffie-hellman-group1-sha1
Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc
ssh-keygen -R xxx.xxx.xxx.xxx
ssh-rsa copy to ~/.ssh/known_hosts