Linux in a Nutshell, 6th Edition

Name

telnet

Synopsis

telnet [options] [host [port]]

Access remote systems. telnet is the user interface that communicates with another host using the Telnet protocol. If telnet is invoked without host, it enters command mode, indicated by its prompt, telnet>, and accepts and executes commands. Type ? at the command prompt to see the available commands. If invoked with arguments, telnet performs an open command (shown in the following list) with those arguments. host indicates the host’s official name, alias, or Internet address. port indicates a port number (default is the Telnet port).

The Telnet protocol is often criticized because it uses no encryption and makes it easy for snoopers to pick up user passwords. Most sites now use ssh instead.

Options

−7

Request 7-bit operation.

−8

Request 8-bit operation.

-a

Automatic login to the remote system.

-b hostalias

Use bind to bind the local socket to an aliased address or the address of an interface other than the one that would be chosen by connect.

-c

Disable reading of the user’s .telnetrc file.

-d

Turn on socket-level debugging.

-e [escape_char]

Set initial telnet escape character to escape_char. If escape_char is omitted, no escape character is predefined.

-E

Disable the escape character functionality.

-f

With Kerberos V5 authentication, allow forwarding of the local credentials to the remote system.

-F

With Kerberos V5 authentication, allow local credentials to be forwarded to the remote system, including any that were already forwarded to the local environment. ...