#THE USE NAME FOR SSH SHELL HOW TO#
#THE USE NAME FOR SSH SHELL PASSWORD#

g Allows remote hosts to connect to local forwarded ports.

The default for the per-user configuration file is ~/.ssh/config. F configfile Specifies a per-user configuration file.

E log_file Append debug logs to log_file instead of standard error. When a connection is made to this port, the connection is forwarded over the secure channel, and the application protocol is then used to determine where to connect to from the remote machine. This allocates a socket to listen to port on the local side. D port Dynamic application-level port forwarding. c cipher_spec Selects the cipher specification for encrypting the session. a Disable forwarding of the authentication agent connection. A Enable forwarding of the authentication agent connection. Some of the most important command-line options for the OpenSSH client are: OpenSSH also supports forwarding Unix domain sockets and IP packets from a tunnel device to establish a VPN (Virtual Private Network).

#THE USE NAME FOR SSH SHELL HOW TO#

See the page on configuring port forwarding on how to configure them. Remote forwarding means that a remote port (at the server computer) is forwarded to a given IP address and port from the client machine. Local fowarding means that a local port (at the client computer) is tunneled to an IP address and port from the server. Configuring port forwardingĬommand-line options can be used to set up port forwarding. See the pages on ssh-keygen and ssh-copy-id for more information. To configure passwordless public key authentication, you may want to create an SSH key and set up an authorized_keys file. For more information, see the page on SSH client configuration file. The ssh command reads its configuration from the SSH client configuration file ~/.ssh/config. On host, type the following command at a shell prompt: ssh ls /tmp/docĪfter authenticating to the remote server, the contents of the remote directory will be displayed, and you will return to your local shell prompt. The syntax for this is: ssh hostname commandįor example, to execute the command: ls /tmp/doc The ssh command is often also used to remotely execute commands on the remote machine without logging in to a shell prompt. It is also possible to use a different username at the remote machine by entering the command as: ssh above can also be expressed with the syntax: ssh -l alternative-username Executing remote commands on the server Once authentication has been accepted, you will be at the shell prompt for the remote machine.

#THE USE NAME FOR SSH SHELL PASSWORD#

For some servers, you may be required to type in a one-time password generated by a special hardware token. Once the server connection has been established, the user is authenticated. This will add the server to your list of known hosts ( ~/.ssh/known_hosts) as seen in the following message: Warning: Permanently added '' (DSA) to the list of known hosts.Įach server has a host key, and the above question related to verifying and saving the host key, so that next time you connect to the server, it can verify that it actually is the same server. Are you sure you want to continue connecting (yes/no)?

If this is the first time you use ssh to connect to this remote machine, you will see a message like: The authenticity of host '' cannot be established. To log in to a remote computer called, type the following command at a shell prompt: ssh The ssh command to log into a remote machine is very simple. Sftp - file transfer client with FTP-like command interface Scp - file transfer client with RCP-like command interface Ssh-agent - agent to hold private key for single sign-on Ssh-copy-id - configures a public key as authorized on a server Ssh-keygen - creates a key pair for public key authentication There are other SSH commands besides the client ssh. Graphical X11 applications can also be run securely over SSH from a remote location. This connection can also be used for terminal access, file transfers, and for tunneling other applications. The ssh command provides a secure encrypted connection between two hosts over an insecure network. Contents SSH Command in Linux Other SSH Commands Using the Linux client Specifying a different user name Executing remote commands on the server SSH client configuration file Configuring public key authentication Configuring port forwarding SSH command line options A little history SSH Command in Linux

The use name for ssh shell