Hoofdstuk 14 meerkeuze

Question 1

UIDs 1-500 are usually reserved for what kind of users?

System accounts, such as server processes
Are not used for user accounts, but for group accounts
Log-in (human) users
Remote log-in accounts

Answer 1

System accounts, such as server processes

Question 2

If a user is deleted, the files and directories that the user owned…

…will show a UID as the owner, but not user name.
…will have no UID owner.
…are deleted as well.
…will have no user owner.

Answer 2

…will show a UID as the owner, but not user name.

Question 3

Which of the following options for the useradd command allows root to specify the UID to be associated with the account?

- U
- u
- G
- g

Answer 3

-u

Question 4

Which of the following options for the useradd command allows root to specify supplementary groups the user will be a member of?

-G
-u
U
-g

Answer 4

-G

Question 5

On a system that does not use UPG, the useradd command will also create a user group. For example, user bob, group bob.
True or False?

True
False

Answer 5

False

Question 6

The useradd command will create a home directory by default for a user.
True or False?

True
False

Answer 6

True

Question 7

The usermod command can be used to do all of the following except…

…add a user to a supplementary group.
…change the user’s MAX and MIN password settings.
…change the user’s home directory.
…change the user’s UID and GID.

Answer 7

…change the user’s MAX and MIN password settings.

Question 8

Which of the following commands will add the group extra to the user bob’s secondary groups in addition to bob’s current secondary groups?

usermod -G extra bob
usermod -a extra bob
usermod -aG extra bob
usermod -ag bob extra

Answer 8

usermod -aG extra bob

Question 9

Which option for the usermod command can be used to specify a user’s group ID (either primary or secondary)?
(choose two)

- g
- G
- s
- S

Answer 9

• g

- G

Question 10

For non-root users, the passwd command can only be used to change the password of the user running the command.
True or False?

True
False

Answer 10

True

Question 11

The userdel command will…

…delete the user account, but leave the user’s files by default.
…will prompt before deleting each file owned by a user.
…automatically delete a user and the user’s home directory and its contents.
…automatically delete a user and all the files owned by that user.

Answer 11

…delete the user account, but leave the user’s files by default.

Question 12

The groupmod command can be used to change a group name.
True or False?

True
False

Answer 12

True

Question 13

The groupmod command can be used to change a group GID.
True or False?

True
False

Answer 13

True

Question 14

The groupmod command can be used to add users to a group.
True or False?

True
False

Answer 14

False

Question 15

Which of the following commands can be used to modify a group?

groupadd
modgroup
addgroup
groupmod

Answer 15

groupmod

Question 16

Which command can be used to determine a user’s most recent log in?

last
history
shell
login

Answer 16

last

Question 17

Which of the following files contains encrypted user password information?

/etc/usr
/etc/shadow
/etc/passwd
/etc/group

Answer 17

/etc/shadow

Question 18

Which of the following files contains user IDs?

/etc/group
/etc/shadow
/etc/usr
/etc/passwd

Answer 18

/etc/passwd

Question 19

Which of the following files does the groupadd command use to determine the new GID when a GID isn’t specified?

/etc/shadow
/etc/group
/etc/passwd
/etc/usr

Answer 19

/etc/group

Question 20

Which of the following commands, run as root, will prevent the user bob from logging in?

usermod -d bob
usermod -l bob
usermod -D bob
usermod -L bob

Answer 20

usermod -L bob

Question 21

What directory contains user’s home directories?

/
/home
/rootfs
/user

Answer 21

/home