A technician attempts to run an executable file on a Linux computer and receives a Permission Denied message. Which of the following commands should the technician use? answer grep chmod ps ls

To address the issue of receiving a "Permission Denied" message when attempting to run an executable file on a Linux computer, the technician should use the command that modifies file permissions. Here are the steps to determine the correct command:

1. Identify the problem: The "Permission Denied" message indicates that the user does not have the necessary permissions to execute the file.

2. Understand the commands:

   • grep: This command is used for searching text using patterns.
   • chmod: This command is used to change the file permissions.
   • ps: This command is used to display information about active processes.
   • ls: This command is used to list directory contents.

3. Select the appropriate command: Since the issue is related to file permissions, the command that changes file permissions is the correct choice.

Therefore, the technician should use the chmod command.