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write can refer to several Unix commands. All known variations of write are used to write messages to another user. The most popular variation sends a message directly to another user's TTY
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Usage
The correct 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.
Example
A conversation initiated between two users on the same machine:
11:19 AM# write root pts/7 test
Will show up to the user on that console as:
Message from root@punch on pts/8 at 11:19 ... test
History
A version of the write command appeared in the First Edition of the Research Unix operating system. Another variation of write writes a message to a user on a Windows network, using the SMB packet format.
Programmer's Workbench UNIX contained a program wall that wrote a message to all users in the same way.
See also
- List of Unix programs
- talk command
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