This is a hidden file, stored by default in a hidden directory, called /.ssh/known_hosts, in the user's home directory. If this is the first time negotiating a connection between the local host and the server, the user will be prompted with the remote host's public key fingerprint and prompted to connect, despite there having been no prior connection: The authenticity of host '' cannot be established.ĭSA key fingerprint is 01:23:45:67:89:ab:cd:ef:ff:fe:dc:ba:98:76:54:32:10.Īre you sure you want to continue connecting (yes/no)?Īnswering yes to the prompt will cause the session to continue, and the host key is stored in the local system's known_hosts file. This command will cause the client to attempt to connect to the server named, using the user ID UserName. The form of that command is the following: ssh The most basic use of SSH is to connect to a remote host for a terminal session. SSH also replaces file transfer programs, such as File Transfer Protocol (FTP) and rcp (remote copy). SSH enables the same functions - logging in to and running terminal sessions on remote systems. Secure Shell was created to replace insecure terminal emulation or login programs, such as Telnet, rlogin (remote login) and rsh (remote shell). An SSH server, by default, listens on the standard Transmission Control Protocol (TCP) port 22. SSH can also be used to create secure tunnels for other application protocols, for example, to securely run X Window System graphical sessions remotely. SSH implementations often include support for application protocols used for terminal emulation or file transfers. SSH uses the client-server model, connecting a Secure Shell client application, which is the end where the session is displayed, with an SSH server, which is the end where the session runs. SSH refers both to the cryptographic network protocol and to the suite of utilities that implement that protocol. In addition to providing strong encryption, SSH is widely used by network administrators to manage systems and applications remotely, enabling them to log in to another computer over a network, execute commands and move files from one computer to another.
REPLACEMENT PUTTY FOR MAC PASSWORD
Secure Shell provides strong password authentication and public key authentication, as well as encrypted data communications between two computers connecting over an open network, such as the internet. SSH also refers to the suite of utilities that implement the SSH protocol. SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an unsecured network.
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