User management

Question 1

Usernames are typically

Answer 1

8 characters
Lowercase
Don’t use special characters

Question 2

Encrypted passwords are stored in

Answer 2

etc/shadow, only readable by root

Question 3

The shell of an account can be

Answer 3

A cli application

Question 4

useradd

Answer 4

Let’s you create a new user with certain parameters, including
-c comment
-m home directory
-s/shell/path the path to the shell

Eg:

useradd -c John Riverton -m /etc

Question 5

userdel

Answer 5

Delete a user
userdel -r alex
Removes home directory

Question 6

usermod

Answer 6

-c sets a comment for the user
-g sets the default group
-G adds additional groups
- s/shell/path sets the shell path

Question 7

groupadd

Answer 7

Options include:
-g to set the GID