HELLO(C)                             UNIX System V



     Name
          hello - send a message to another user


     Syntax
          hello user [ tty ]


     Description
          hello sends messages from one user to another.   When  first
          called, hello displays the following message:
               Message  from  sender's-system! sender's-name sender's-
               tty
          The recipient of the  message  should  write  back  at  this
          point.   Communication continues until an interrupt is sent.
          (On  most  terminals,  pressing  the  Del   key   sends   an
          interrupt.)  At that point hello prints ``(end of message)''
          on the other terminal, and exits.

          To write to a user who is logged in more than once, the user
          can  employ  the  tty  argument  to  specify the appropriate
          terminal name.  The who(C) command can be used to  determine
          the correct terminal name.

          Permission  to  write  may  be  allowed  or  denied  by  the
          recipient,  using  the  mesg command.  Writing is allowed by
          default.  Certain commands, such as nroff and  pr,  prohibit
          messages in order to prevent disruption of output.

          If the character ! is found at  the  beginning  of  a  line,
          hello  calls  the shell to execute the rest of the line as a
          command.

          The following protocol is suggested for using  hello.   When
          first  writing  to  another user, the sender should wait for
          that user to write back  before  sending  a  message.   Each
          party  should end each message with a signal indicating that
          the other may reply: o for ``over''  is  conventional.   The
          signal   oo   for   ``over   and  out''  is  suggested  when
          conversation is about to be terminated.


     Files
          /etc/utmp
          /bin/sh


     See Also
          mesg(C), who(C), mail(C)


     Value Added
          hello is an extension of AT&T System V provided by the Santa
          Cruz Operation.


     (printed 2/15/90)                                   HELLO(C)