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In our previous articles, we discussed how to setup ssh key based authentication to perform ssh and scp without password under the following three scenarios: OpenSSH to OpenSSH OpenSSH to SSH2 SSH2 to SSH2 In this article, I'll explain how to perform ssh and scp from SSH2 (local-host) to OpenSSH (remote-host) with no password. In [...]


SSH Key based authentication setup from openSSH to SSH2

The previous articles (openSSH to openSSH setup, SSH2 to SSH2 setup) explains about how to setup key based authentication on the same version of ssh to perform ssh and scp without entering password. This article explains how to setup SSH key based authentication between different version of SSH (from openSSH to SSH2) to perform ssh [...]


Howto resolve Algorithm negotiation failed issue on SSH

 While performing ssh from a local-host to a remote-host that are on different versions of ssh, it is possible that you may get "Algorithm negotiation failed" message.  In this post, I'll explain how to resolve this issue from the ssh client.  1. Unable to ssh to remote-host: In this example, when trying to perform ssh [...]


Perform SSH and SCP Without Entering Password on openSSH

In this article, I'll explain how to perform ssh and scp without entering the password using the SSH Public Key authentication with SSH Agent on openSSH There are two levels of security in the SSH key based authentication. In order for you to login, you need both the private key and the passphrase. Even if [...]


5 Basic Linux SSH Client Commands

Let us review the following 5 basic command line usage of the ssh client. Identify SSH client version Login to remote host Transfer Files to/from remote host Debug SSH client connection SSH escape character usage: (Toggle SSH session, SSH session statistics etc.) Sometimes it may be necessary to identify the SSH client that you are [...]