Linux Commands for Writing Messages to Logged-in Users

How to Write Messages to Logged-in Users in Linux

Question

Which of the following commands will write a message to the terminals of all logged in users?

Answers

Explanations

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A. B. C. D. E.

D

The correct command to write a message to the terminals of all logged in users is the wall command.

The options provided in the question are:

A. bcast - This is not a valid command on most Linux distributions. It may be a command on some custom systems, but it is not a standard command.

B. mesg - This command is used to control whether or not other users can send messages to your terminal. It does not send messages to other users.

C. print - This command is used to print a file or files to a printer. It does not send messages to other users.

D. wall - This command sends a message to all users who are currently logged in. The message is displayed on their terminal in the form of a banner. The syntax for the command is wall <message>. For example, if you want to send the message "Hello, world!" to all logged in users, you would type wall Hello, world!.

E. yell - This is not a valid command on most Linux distributions. It may be a command on some custom systems, but it is not a standard command.

Therefore, the correct answer is D. wall.