write

The "write" command line tool is a simple and efficient way to send messages to other users on a Unix-like operating system. It allows users to communicate with each other directly from the command line interface.

To use the "write" command, you need to know the username of the person you wish to send a message to. By typing "write" followed by the username, you can open a chat session with that user.

Once the chat session starts, any text you type will be sent as a message to the other user. They will receive your message on their terminal, and they can reply back instantly. This makes it a quick and convenient way to have conversations without the need for any external programs or tools.

The "write" command also supports multiple terminal windows. If you are using multiple terminals and want to send a message to a user logged in on a different terminal, you can specify the terminal number along with the username. This feature is especially useful in collaborative environments or when using multiple remote sessions.

To end a chat session, either user can exit by pressing the "Ctrl + D" key combination. This will close the chat session and return both users back to their regular command line interface.

The "write" command provides a simple and lightweight messaging solution, particularly suitable for quick communication between users on the same system. However, it is important to note that this tool only works with users who are logged into the same system, and it does not support sending messages to users on remote systems.