5. ____ command allows superuser to communicate with users*1 pointa) commb) cronc) dated) wall

Break Down the Problem

1. Identify the commands presented in the options.
2. Determine which command is used for communication by the superuser.

Relevant Concepts

• Each command has specific functionality in a Unix/Linux environment.

Analysis and Detail

1. comm: This command is used to compare two sorted files line by line.
2. cron: This is used for scheduling tasks to run at specific intervals, not for communication.
3. date: This command is used to display or set the system date and time.
4. wall: This command sends messages to all logged-in users.

Verify and Summarize

Among the options presented, the command that enables the superuser (root) to send messages to all users is wall.

Final Answer

The correct answer is: d) wall.