SSH related commands
The following table provides a brief description for various ssh related commands
| Program | Description |
|---|---|
| ssh | A program for logging in to a remote machine and for executing commands on a remote machine. The command is intended to replace rlogin and rsh, and provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. |
| sshd | The daemon for Secure listens. This daemon listens for connections from clients and provides secure encrypted communications between two untrusted hosts over an insecure network. ssh-keygen Generates and manages authentication keys for ssh. |
| ssh-agent | A program that holds private keys that are used for public key authentication. ssh-agent is started at the beginning of an X-session or a login session, and all other windows or programs are started as clients to the ssh-agent program. Through the use of environment variables, the agent can be located and automatically used for authentication when users log in to other machines while using ssh. |
| ssh-add | Adds RSA or DSA identities (keys) to the authentication agent, ssh-agent. |
| scp | Securely copies files between hosts on a network by using ssh for data transfer. Unlike rcp, scp asks for passwords or passphrases (if they are needed for authentication). |
| sftp | An interactive file transfer program, similar to ftp, that performs all operations over an encrypted ssh transport. sftp connects and logs into the specified host name and then enters an interactive command mode. |