In Unix and Unix-like operating systems, is a utility used to send messages to another user by writing a message directly to another user's TTY.
History The write command was included in the First Edition of the Research Unix operating system. A similar command appeared in Compatible Time-Sharing System.
Sample usage The syntax for the write command is: $ write user [tty] message
The write session is terminated by sending EOF, which can be done by pressing Ctrl+D. The tty argument is only necessary when a user is logged into more than one terminal.
A conversation initiated between two users on the same machine: $ write root pts/7 Hello!
Will show up to the user on that console as: Message from root@wiki on pts/8 at 11:19 ... Hello!
See also
List of Unix commands talk (Unix) wall (Unix)
References