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CentOS 7.0 - man page for write (centos section 1)

WRITE(1)				  User Commands 				 WRITE(1)

       write - send a message to another user

       write user [ttyname]

       Write  allows  you to communicate with other users, by copying lines from your terminal to

       When you run the write command, the user you are writing to gets a message of the form:

	      Message from yourname@yourhost on yourtty at hh:mm ...

       Any further lines you enter will be copied to the specified user's terminal.  If the other
       user wants to reply, they must run write as well.

       When  you  are  done, type an end-of-file or interrupt character.  The other user will see
       the message EOF indicating that the conversation is over.

       You can prevent people (other than the super-user) from writing to you  with  the  mesg(1)
       command.   Some	commands,  for example nroff(1) and pr(1), may disallow writing automati-
       cally, so that your output isn't overwritten.

       If the user you want to write to is logged in on more than one terminal, you  can  specify
       which  terminal	to  write to by specifying the terminal name as the second operand to the
       write command.  Alternatively, you can let write select one of the  terminals  -  it  will
       pick  the  one  with  the shortest idle time.  This is so that if the user is logged in at
       work and also dialed up from home, the message will go to the right place.

       The traditional protocol for writing to someone is that the string `-o', either at the end
       of  a  line  or on a line by itself, means that it's the other person's turn to talk.  The
       string `oo' means that the person believes the conversation to be over.

       mesg(1), talk(1), who(1)

       A write command appeared in Version 6 AT&T UNIX.

       The write command is part of the util-linux package and is available  from  ftp://ftp.ker-

util-linux				    March 1995					 WRITE(1)

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