Understanding Root User and Elevated Permissions

Question 1

A special account for administration on a Linux Host

Answer 1

Root user

Question 2

User that has access to all files and programs and has the ability to change ownership, permissions and modify user accounts

Answer 2

root/superuser/admin

Question 3

This file is used to determine a user’s or groups sudo privileges.

Answer 3

sudoers file
sudoers.d is the drop in directory that is read along with the sudoers file to determine privileges.

Question 4

The drop in directory that is used to help with organization and ordering of configurations

Answer 4

sudoers.d

Question 5

This is the open ssh daemon config file.

Answer 5

/etc/ssh/sshd_config

Question 6

In order to disable root logins?

Answer 6

Set the PErmitRootLogin option to no in the OpenSSH SSH Daemon config file

Question 7

Used to edit the sudoers file.

Answer 7

visudo

Question 8

This provides a lock on the sudoers file against multiple simultaneous edits, provides basic santity checks and checks for parse errors.

Answer 8

visudo

Question 9

Allows users to run commands with a substitute user and group ID.

Answer 9

su

Question 10

When run without arguments it defaults to running an interactive shell as the root user

Answer 10

su

Question 11

These options when used with su will start the shell as a login shell with an environment similar to a real login shell

Answer 11

su -, -l and –login

Question 12

Allows a user to execute a command as the super user or another user

Answer 12

sudo

Question 13

These privileges are set in the sudoers file

Answer 13

sudo