talk(1) General Commands Manual talk(1)
talk - Converses with another user
talk user [tty_name]
Interfaces documented on this reference page conform to industry standards as follows:
Refer to the standards(5) reference page for more information about industry standards and associated tags.
The name of the desired recipient in the form returned by the who utility.
[Tru64 UNIX] If the second user is on a remote host, the name of the host must be specified in one of the following ways:
user@host host!user host.user host:user If the recipient is logged in more than once, the tty_name argument can be used to indicate
the appropriate terminal name. If tty_name is not specified, the talk message is displayed on one or more accessible terminals in
use by the recipient. The format of tty_name is the same as that returned by the who command.
The talk command allows two users to enter text simultaneously into windows displayed on each other's terminals. To initiate a conversa-
tion, one user executes talk and specifies the second user's username.
[Tru64 UNIX] When using full domain names, the only valid form for specifying the user and host is user@host. For example,
email@example.com initiates a conversation with user andy at host host17 in the dev.abc.com domain.
When the first user initiates the conversation, a message is sent to the second user. If the first user also specifies tty_name, the invi-
tation message is sent to the specified terminal. Otherwise, the invitation is sent to the terminal on the remote host on which the second
user first logged in. Once this invitation is received, talk displays two windows on the first user's terminal and displays progress mes-
sages until the second user responds to the initial message.
If the second user wants to have the conversation, the second user also executes talk from any terminal and specifies the first user's
account name and hostname, if appropriate. If the second user accepts the invitation, talk displays two windows on the second user's ter-
minal. One window displays what is typed by the local user; the other displays what is typed by the remote user. To end the conversation
and close the connection, either user can press the Interrupt key sequence.
If the second user does not want to permit talk invitations, that user should issue the mesg n command.
The talk command processes characters as follows: Typing the <alert> character alerts the recipient's terminal. Typing <Ctrl-L> causes the
sender's screen regions to be refreshed. Typing the Erase and Kill characters affects the sender's terminal as described on the termios
reference page. Typing the Interrupt or End-of-File characters terminates the local talk program. Once the talk session has been termi-
nated on one side, the other side of the session is notified that the talk session has been terminated and this side can do nothing except
exit. Typing characters from LC_TYPE classifications print or space causes those characters to be sent to the recipient's terminal.
The talk command fails when a user lacks the appropriate privileges to perform the requested action.
[Tru64 UNIX] The talk command uses the talk 4.3BSD protocol, which is not compatible with 4.2BSD versions of talk.
The following exit values are returned: Successful completion. An error occurred or your terminal is incapable of supporting talk.
If john at host1 wants to talk to fred, who is logged in on host2, john enters: $ talk fred@host2
The following message is displayed on fred's terminal: Message from TalkDaemon@host1 at 15:16... talk: connection requested by
john@host1. talk: respond with: talk john@host1
To accept the invitation, fred enters: $ talk john@host1 To talk to fred only if he is logged in on the console at host2, enter: $
talk fred@host2 console
The following environment variables affect the execution of *cmd*: Provides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari-
ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value,
overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes
of text data as characters (for example, single-byte as opposed to multbyte characters in arguments and input files). If the recipient's
locale does not use an LC_CTYPE equivalent to yours, the results are undefined. Determines the locale for the format and contents of diag-
nostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES.
Commands: mesg(1), named(8), stty(1), talkd(8), who(1), write(1)