RHCSA Ch5

Question 1

delete user and home directory

Answer 1

userdel -r bob

Question 2

modify a user

Answer 2

usermod

Question 3

usermod specify home dir

Answer 3

• d homedir

- m =to move directory

Question 4

Change user ID

Answer 4

-u 1234

Question 5

usermod change primary group ID

Answer 5

-g 1234

group must exist first

Question 6

usermod append to existing settings

Answer 6

-a

Question 7

usermod change login name

Answer 7

-l name

Question 8

usermod lock or unlock account

Answer 8

• L

- U

Question 9

add a new group

Answer 9

groupadd -g 1010 jane

Question 10

Delete password

Answer 10

passwd -d user

Question 11

expire password

Answer 11

passwd -e user

Question 12

Lock password

Answer 12

passwd -l user

Question 13

Unlock password

Answer 13

passwd -u user

Question 14

Password Output status

Answer 14

passwd -S user

Question 15

how do you know if a users password is locked?

Answer 15

The password hash in /etc/shadow will begin with !!
or
sudo passwd -S brian

Question 16

where are password parameters stored

Answer 16

/etc/security/pwquality.conf

Question 17

where is the password aging parameters stored

Answer 17

/etc/login.defs

Question 18

how to change password aging?

Answer 18

chage [option]

• d = last day account is active = -d 0 = will force user to reset password on next login
• E = expire date = sudo chage -E 2025-01-01 brian
• I = inactive days (capital i)
• m = Minimum days until change
• M = Max days valid
• W - warn days
• l = list

Question 19

add a new goup

Answer 19

sudo groupadd -g 1050 accounting

Question 20

change a group id number

Answer 20

sudo groupmod -g 1051 accounting

Question 21

place brian in the the account group

Answer 21

sudo gpasswd -a brian accounting
sudo usermod -a -G accounting brian
-a = append

Question 22

give a group a password

Answer 22

sudo gpasswd accounting

Question 23

list what groups you are apart of

Answer 23

groups

Question 24

change into a group that you do not belong to

Answer 24

newgrp accounting

Question 25

make brian an admin of the accounting group

Answer 25

sudo gpasswd -A brian accounting

then you have to re-add brian if you want him to administer the group and be apart of it

Question 26

who are you logged in as

Answer 26

whoami

Question 27

who did you log in as

Answer 27

logname

Question 28

how to configure sudoer config file

Answer 28

edit /etc/sudoers
or
sudo visudo

Question 29

what group allows users to use sudo on all commands

Answer 29

wheel group