SSH and SSH client under Linux

You will often see the SSH client, or you may hear ssh to a machine. Question: What is the relationship between SSH and SSH clients?

1, ssh,secure Shell, is a network interaction protocol, also refers to the implementation of the Protocol Network Service program. Mainly used for remote machine management, including both client and server parts.

The server is a daemon (daemon) that runs in the background and responds to connection requests from the client. 　　The server is usually the sshd process, which provides the processing of the remote connection, generally including public key authentication, key exchange, symmetric key encryption and non-secure connection. 　　The client includes SSH programs and other applications such as SCP (remote copy), slogin (remote login), SFTP (Secure file transfer), etc. Their working mechanism is roughly the local client sending a connection request to the remote server side, the server checks the requested package and IP address to send the key to the SSH client, and then sends the key back to the server locally, since the connection was established.

That is, SSH includes the SSH client and the sshd server.

The presence of the client is related to how Linux is used, and is typically done through the client Operations server.

2. SSH-enabled clients such as SECURECRT. What is SECURECRT?

Software that can be connected to Linux servers under Windows, the supported connection protocols include SSH1,SSH2 ... After connecting to provide a variety of virtual terminal for users to operate, such as you can choose to xterm,linux,ansi god Horse.

These terminals receive user input and operate the remote machine via the SSH protocol.

SSH and SSH client under Linux