The utilities discussed in this section exchange messages and files with other users either interactively or through e-mail.
The write utility sends a message to another user who is logged in. When you and another user use write to send messages to each other, you establish two-way communication. Initially a write command (Figure 3-14) displays a banner on the other user's terminal, saying that you are about to send a message.
$ write alex Hi Alex, are you there? o
The syntax of a write command line is
write destination-user [terminal]
The destination-user is the login name of the user you want to communicate with. The terminal is the optional terminal ...