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talk(1) [osx man page]

TALK(1) 						    BSD General Commands Manual 						   TALK(1)

NAME
talk -- talk to another user SYNOPSIS
talk person [ttyname] DESCRIPTION
The talk utility is a visual communication program which copies lines from your terminal to that of another user. Options available: person If you wish to talk to someone on your own machine, then person is just the person's login name. If you wish to talk to a user on another host, then person is of the form 'user@host' or 'host!user' or 'host:user'. ttyname If you wish to talk to a user who is logged in more than once, the ttyname argument may be used to indicate the appropriate terminal name, where ttyname is of the form 'ttyXX'. When first called, talk sends the message Message from TalkDaemon@his_machine... talk: connection requested by your_name@your_machine. talk: respond with: talk your_name@your_machine to the user you wish to talk to. At this point, the recipient of the message should reply by typing talk your_name@your_machine It does not matter from which machine the recipient replies, as long as his login-name is the same. Once communication is established, the two parties may type simultaneously, with their output appearing in separate windows. Typing control-L '^L' will cause the screen to be reprinted. Typing control-D '^D' will clear both parts of your screen to be cleared, while the control-D character will be sent to the remote side (and just displayed by this talk client). Your erase, kill, and word kill characters will behave normally. To exit, just type your interrupt character; talk then moves the cursor to the bottom of the screen and restores the terminal to its previous state. Permission to talk may be denied or granted by use of the mesg(1) command. At the outset talking is allowed. CONFIGURATION
The talk utility relies on the talkd system daemon. See talkd(8) for information about enabling talkd. FILES
/etc/hosts to find the recipient's machine /var/run/utmpx to find the recipient's tty SEE ALSO
mail(1), mesg(1), wall(1), who(1), write(1), talkd(8) HISTORY
The talk command appeared in 4.2BSD. In FreeBSD 5.3, the default behaviour of talk was changed to treat local-to-local talk requests as originating and terminating at localhost. Before this change, it was required that the hostname (as per gethostname(3)) resolved to a valid IPv4 address (via gethostbyname(3)), making talk unsuitable for use in configurations where talkd(8) was bound to the loopback interface (normally for security reasons). BUGS
The version of talk released with 4.3BSD uses a protocol that is incompatible with the protocol used in the version released with 4.2BSD. Multibyte characters are not recognized. BSD
August 21, 2008 BSD

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TALK(1) 						    BSD General Commands Manual 						   TALK(1)

NAME
talk -- talk to another user SYNOPSIS
talk person [-x] [ttyname] DESCRIPTION
Talk is a visual communication program which copies lines from your terminal to that of another user. Options available: person If you wish to talk to someone on your own machine, then person is just the person's login name. If you wish to talk to a user on another host, then person is of the form 'user@host' ( or 'host.user' or 'host!user' or 'host:user' ). -x If you wish to talk to a user who has dot character in username, the -x argument will force 'user@host' form of the person and talk will take dots as part of user name. ttyname If you wish to talk to a user who is logged in more than once, the ttyname argument may be used to indicate the appropriate terminal name, where ttyname is of the form 'ttyXX' or 'pts/X'. When first called, talk contacts the talk daemon on the other user's machine, which sends the message Message from TalkDaemon@his_machine... talk: connection requested by your_name@your_machine. talk: respond with: talk your_name@your_machine to that user. At this point, he then replies by typing talk your_name@your_machine It doesn't matter from which machine the recipient replies, as long as his login name is the same. Once communication is established, the two parties may type simultaneously; their output will appear in separate windows. Typing control-L (^L) will cause the screen to be reprinted. The erase, kill line, and word erase characters (normally ^H, ^U, and ^W respectively) will behave normally. To exit, just type the interrupt character (normally ^C); talk then moves the cursor to the bottom of the screen and restores the terminal to its previous state. As of netkit-ntalk 0.15 talk supports scrollback; use esc-p and esc-n to scroll your window, and ctrl-p and ctrl-n to scroll the other win- dow. These keys are now opposite from the way they were in 0.16; while this will probably be confusing at first, the rationale is that the key combinations with escape are harder to type and should therefore be used to scroll one's own screen, since one needs to do that much less often. If you do not want to receive talk requests, you may block them using the mesg(1) command. By default, talk requests are normally not blocked. Certain commands, in particular nroff(1), pine(1), and pr(1), may block messages temporarily in order to prevent messy output. FILES
/etc/hosts to find the recipient's machine /var/run/utmp to find the recipient's tty SEE ALSO
mail(1), mesg(1), who(1), write(1), talkd(8) BUGS
The protocol used to communicate with the talk daemon is braindead. Also, the version of talk(1) released with 4.2BSD uses a different and even more braindead protocol that is completely incompatible. Some vendor Unixes (particularly those from Sun) have been found to use this old protocol. Old versions of talk may have trouble running on machines with more than one IP address, such as machines with dynamic SLIP or PPP connec- tions. This problem is fixed as of netkit-ntalk 0.11, but may affect people you are trying to communicate with. HISTORY
The talk command appeared in 4.2BSD. Linux NetKit (0.17) November 24, 1999 Linux NetKit (0.17)
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