After upgrading the Laptop OS when I try to login to my old machine I got this error message.... jay@jay:~$ ssh -p 2222 jay@jpudasaini.com.np Unable to negotiate with 192.168.156.101 port 2222: no matching host key type found. Their offer: ssh-dss I can't access the system, here is the solution jay@jay:~$ ssh -oHostKeyAlgorithms=+ssh-dss -p 2222 jay@jpudasaini.com.npThe authenticity of host '[jpudasaini.com.np]:2222 ([192.168.156.101]:2222)' can't be established. DSA key fingerprint is SHA256:J#$/zFpzr05gdfrshufHHOQvss6NQcEpPMgKlibTc. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '[jpudasaini.com.np]:2222,[192.168.156.101]:2222' (DSA) to the list of known hosts. Password: Now Just type the password