Question

Which command can be executed by a user who is already logged into the system, in order to change to the root user?

1) su
2) root
3)hroot
4) None of the above

Answer 1

The correct command to switch to the root user for someone already logged into the system is 'su', often used as 'su -' to inherit the root user's environment variables.

Step-by-step explanation:

The command that can be executed by a user who is already logged into the system in order to change to the root user is su. When using the su command, it is usually followed by a hyphen to ensure that the user's environment variables are set to those of the root user. For example, the full command to switch to root would be su -. It is vital to ensure that you have the root user's password or are permitted to switch to root, as this level of access offers complete control over the system and should be used responsibly.