A technician attempts to run an executable file on a Linux computer but receives a Permission Denied message.

Which of the following command should the technician use?

A. chmod

B. grep

C. Is

D. ps

A: chmod

The chmod command in Linux is used to add permissions for the user who owns the file to execute it. Many Linux operating systems inherit a strict ownership model from Unix. This implies that a user must have specific privileges and permissions in order to manipulate certain files. It is the work of the chmod command to change permissions.